We don't want this to accidentally activate if -lasan is no longer a
requirement someday - BRL-CAD's code isn't ready for it yet.  In
particular, the LeakSanitizer trips up on the rt_free_rti/rt_clean
tangle as well as _db_walk_subtree.  The former may need elimination of
the rt_uniresource global to properly clean up, and the latter is deep
in the raytracing core and will have to be approached very carefully.

For convenience, here are the backtraces:

889: Test command: build/bin/gqa "-P" "1" "-Ao" "-p" "ovlp_" "brlcad/src/gtools/tests/../../libged/tests/ged_tests.g" "ovlp"
889: Test timeout computed to be: 1500
889: Trying initial grid spacing: 50 mm
889: Using grid spacing lower limit: 0.005 mm
889: Plotting overlaps to ovlp_overlaps.plot3
889: Processing with grid spacing 50 mm 44 x 48 x 39
889: Summary (50mm grid spacing):
889: list Overlaps:
889: /ovlp/r1 /ovlp/r2 count:2277 dist:1780.3mm @ (-248 350 -903.325)
889:
889: =================================================================
889: ==672620==ERROR: LeakSanitizer: detected memory leaks
889:
889: Direct leak of 524288 byte(s) in 1024 object(s) allocated from:
889:     #0 0x498087 in posix_memalign (build/bin/gqa+0x498087)
889:     #1 0x7f9d3ca476c3 in alloc brlcad/src/libbu/malloc.c:137:10
889:     #2 0x7f9d3ca478f6 in bu_calloc brlcad/src/libbu/malloc.c:174:12
889:     #3 0x7f9d3ca9b25e in bu_ptbl_init brlcad/src/libbu/ptbl.c:45:26
889:     #4 0x7f9d40d38be4 in rt_init_resource brlcad/src/librt/prep.c:855:2
889:     #5 0x7f9d40d3ba65 in rt_clean_resource brlcad/src/librt/prep.c:1063:5
889:     #6 0x7f9d40d3239a in rt_clean brlcad/src/librt/prep.c:1210:6
889:     #7 0x7f9d40d30f80 in rt_free_rti brlcad/src/librt/prep.c:170:5
889:     #8 0x7f9d380c4573  (<unknown module>)
889:     #9 0x7f9d424f2526 in ged_exec brlcad/src/libged/exec.cpp:83:16
889:     #10 0x7f9d424fd51b in ged_gqa brlcad/src/libged/exec_mapping.cpp:177:1
889:     #11 0x4c8b17 in main brlcad/src/gtools/gqa.c:105:11
889:     #12 0x7f9d3c6be0b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
889:
889: Direct leak of 524288 byte(s) in 1024 object(s) allocated from:
889:     #0 0x498087 in posix_memalign (build/bin/gqa+0x498087)
889:     #1 0x7f9d3ca476c3 in alloc brlcad/src/libbu/malloc.c:137:10
889:     #2 0x7f9d3ca478f6 in bu_calloc brlcad/src/libbu/malloc.c:174:12
889:     #3 0x7f9d3ca9b25e in bu_ptbl_init brlcad/src/libbu/ptbl.c:45:26
889:     #4 0x7f9d40d38c65 in rt_init_resource brlcad/src/librt/prep.c:858:2
889:     #5 0x7f9d380c0db2  (<unknown module>)
889:     #6 0x7f9d424f2526 in ged_exec brlcad/src/libged/exec.cpp:83:16
889:     #7 0x7f9d424fd51b in ged_gqa brlcad/src/libged/exec_mapping.cpp:177:1
889:     #8 0x4c8b17 in main brlcad/src/gtools/gqa.c:105:11
889:     #9 0x7f9d3c6be0b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
889:
889: Direct leak of 64 byte(s) in 2 object(s) allocated from:
889:     #0 0x498087 in posix_memalign (build/bin/gqa+0x498087)
889:     #1 0x7f9d3ca476c3 in alloc brlcad/src/libbu/malloc.c:137:10
889:     #2 0x7f9d3ca478f6 in bu_calloc brlcad/src/libbu/malloc.c:174:12
889:     #3 0x7f9d40ce3610 in _db_walk_subtree brlcad/src/librt/db_tree.c:1914:6
889:     #4 0x7f9d40cdd664 in _db_walk_dispatcher brlcad/src/librt/db_tree.c:1992:2
889:     #5 0x7f9d3ca795da in bu_parallel brlcad/src/libbu/parallel.c:574:2
889:     #6 0x7f9d40cdc2a2 in db_walk_tree brlcad/src/librt/db_tree.c:2199:5
889:     #7 0x7f9d41893a86 in rt_gettrees_muves brlcad/src/librt/tree.c:779:6
889:     #8 0x7f9d4189bb3f in rt_gettrees_and_attrs brlcad/src/librt/tree.c:883:12
889:     #9 0x7f9d4189bcba in rt_gettree brlcad/src/librt/tree.c:896:11
889:     #10 0x7f9d380c0e88  (<unknown module>)
889:     #11 0x7f9d424f2526 in ged_exec brlcad/src/libged/exec.cpp:83:16
889:     #12 0x7f9d424fd51b in ged_gqa brlcad/src/libged/exec_mapping.cpp:177:1
889:     #13 0x4c8b17 in main brlcad/src/gtools/gqa.c:105:11
889:     #14 0x7f9d3c6be0b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
889:
889: Direct leak of 64 byte(s) in 2 object(s) allocated from:
889:     #0 0x498087 in posix_memalign (build/bin/gqa+0x498087)
889:     #1 0x7f9d3ca476c3 in alloc brlcad/src/libbu/malloc.c:137:10
889:     #2 0x7f9d3ca478f6 in bu_calloc brlcad/src/libbu/malloc.c:174:12
889:     #3 0x7f9d40c2a4bc in rt_comb_import5 brlcad/src/librt/comb/comb.c:518:6
889:     #4 0x7f9d40c79613 in rt_db_external5_to_internal5 brlcad/src/librt/db5_io.c:958:8
889:     #5 0x7f9d40c79e9f in rt_db_get_internal5 brlcad/src/librt/db5_io.c:998:11
889:     #6 0x7f9d40ce6b76 in rt_db_get_internal brlcad/src/librt/dir.c:131:9
889:     #7 0x7f9d40cd31b4 in db_recurse brlcad/src/librt/db_tree.c:1016:6
889:     #8 0x7f9d40ce34ee in _db_walk_subtree brlcad/src/librt/db_tree.c:1898:16
889:     #9 0x7f9d40cdd664 in _db_walk_dispatcher brlcad/src/librt/db_tree.c:1992:2
889:     #10 0x7f9d3ca795da in bu_parallel brlcad/src/libbu/parallel.c:574:2
889:     #11 0x7f9d40cdc2a2 in db_walk_tree brlcad/src/librt/db_tree.c:2199:5
889:     #12 0x7f9d41893a86 in rt_gettrees_muves brlcad/src/librt/tree.c:779:6
889:     #13 0x7f9d4189bb3f in rt_gettrees_and_attrs brlcad/src/librt/tree.c:883:12
889:     #14 0x7f9d4189bcba in rt_gettree brlcad/src/librt/tree.c:896:11
889:     #15 0x7f9d380c0e88  (<unknown module>)
889:     #16 0x7f9d424f2526 in ged_exec brlcad/src/libged/exec.cpp:83:16
889:     #17 0x7f9d424fd51b in ged_gqa brlcad/src/libged/exec_mapping.cpp:177:1
889:     #18 0x4c8b17 in main brlcad/src/gtools/gqa.c:105:11
889:     #19 0x7f9d3c6be0b2 in __libc_start_main /build/glibc-eX1tMB/glibc-2.31/csu/../csu/libc-start.c:308:16
889:
889: SUMMARY: AddressSanitizer: 1048704 byte(s) leaked in 2052 allocation(s).