Update run-make test front-files from .woff to .woff2

src/test/run-make/emit-shared-files/Makefile

@@ -14,7 +14,7 @@ invocation-only:
 	[ -e $(INVOCATION_ONLY)/x/index.html ]
 	[ -e $(INVOCATION_ONLY)/theme-xxx.css ] # generated from z.css
 	! [ -e $(INVOCATION_ONLY)/storage-xxx.js ]
-	! [ -e $(INVOCATION_ONLY)/SourceSerif4-It.ttf.woff ]
+	! [ -e $(INVOCATION_ONLY)/SourceSerif4-It.ttf.woff2 ]
 
 	# FIXME: this probably shouldn't have a suffix
 	[ -e $(INVOCATION_ONLY)/y-xxx.css ]
@@ -24,7 +24,7 @@ invocation-only:
 toolchain-only:
 	$(RUSTDOC) -Z unstable-options --emit=toolchain-shared-resources --output $(TOOLCHAIN_ONLY) --resource-suffix=-xxx --extend-css z.css x.rs
 	[ -e $(TOOLCHAIN_ONLY)/storage-xxx.js ]
-	! [ -e $(TOOLCHAIN_ONLY)/SourceSerif4-It.ttf.woff ]
+	! [ -e $(TOOLCHAIN_ONLY)/SourceSerif4-It.ttf.woff2 ]
 	! [ -e $(TOOLCHAIN_ONLY)/search-index-xxx.js ]
 	! [ -e $(TOOLCHAIN_ONLY)/x/index.html ]
 	! [ -e $(TOOLCHAIN_ONLY)/theme.css ]
@@ -35,7 +35,7 @@ toolchain-only:
 all-shared:
 	$(RUSTDOC) -Z unstable-options --emit=toolchain-shared-resources,unversioned-shared-resources --output $(ALL_SHARED) --resource-suffix=-xxx --extend-css z.css x.rs
 	[ -e $(ALL_SHARED)/storage-xxx.js ]
-	[ -e $(ALL_SHARED)/SourceSerif4-It.ttf.woff ]
+	[ -e $(ALL_SHARED)/SourceSerif4-It.ttf.woff2 ]
 	! [ -e $(ALL_SHARED)/search-index-xxx.js ]
 	! [ -e $(ALL_SHARED)/settings.html ]
 	! [ -e $(ALL_SHARED)/x ]