[DOC] Fix rdoc coverages for rdoc-srcdir

Author: nobu

common.mk

@@ -697,10 +697,10 @@ html: PHONY main srcs-doc
 
 rdoc-coverage: PHONY main srcs-doc
 	@echo Generating RDoc coverage report
-	$(Q) $(RDOC) --quiet -C $(RDOCFLAGS) "$(srcdir)"
+	$(Q) $(RDOC) --quiet -C $(RDOCFLAGS) .
 
 undocumented: PHONY main srcs-doc
-	$(Q) $(RDOC) --quiet -C $(RDOCFLAGS) "$(srcdir)" | \
+	$(Q) $(RDOC) --quiet -C $(RDOCFLAGS) . | \
 	sed -n \
 	-e '/^ *# in file /{' -e 's///;N;s/\n/: /p' -e '}' \
 	-e 's/^ *\(.*[^ ]\) *# in file \(.*\)/\2: \1/p' | sort