Make sure all necessary RPM path macros are defined

When building (s)rpm files through the Makefile, a directory structure
is created in /tmp to hold the various files.

In case the user running the command has overridden some of the RPM path
settings through their user profile (for example in `~/.rpmmacros`),
these paths do not line up with the configuration, and the build fails.

Make sure all paths used are properly defined.

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Ralf Ertzinger <[email protected]>
Closes openzfs#15756

config/rpm.am

@@ -83,6 +83,11 @@ srpm-common:
 		rpm-local || exit 1; \
 	LANG=C $(RPMBUILD) \
 		--define "_tmppath $$rpmbuild/TMP" \
+		--define "_builddir $$rpmbuild/BUILD" \
+		--define "_rpmdir $$rpmbuild/RPMS" \
+		--define "_srcrpmdir $$rpmbuild/SRPMS" \
+		--define "_specdir $$rpmbuild/SPECS" \
+		--define "_sourcedir $$rpmbuild/SOURCES" \
 		--define "_topdir $$rpmbuild" \
 		$(def) -bs $$rpmbuild/SPECS/$$rpmspec || exit 1; \
 	cp $$rpmbuild/SRPMS/$$rpmpkg . || exit 1; \
@@ -99,6 +104,11 @@ rpm-common:
 		rpm-local || exit 1; \
 	LANG=C ${RPMBUILD} \
 		--define "_tmppath $$rpmbuild/TMP" \
+		--define "_builddir $$rpmbuild/BUILD" \
+		--define "_rpmdir $$rpmbuild/RPMS" \
+		--define "_srcrpmdir $$rpmbuild/SRPMS" \
+		--define "_specdir $$rpmbuild/SPECS" \
+		--define "_sourcedir $$rpmbuild/SOURCES" \
 		--define "_topdir $$rpmbuild" \
 		$(def) --rebuild $$rpmpkg || exit 1; \
 	cp $$rpmbuild/RPMS/*/* . || exit 1; \