wrap !ifdef MOZ_DEBUG around custom .cpp rule so that if you are building optimized with

debug symbols, the rule doesn't go looking for PDB files that don't exist.
approved: kipp

layout/html/tests/makefile.win

@@ -87,7 +87,9 @@ clobber::
         $(INCS)
         $(LLIBS)
         $(OS_LIBS)
+!ifdef MOZ_DEBUG
         -Fd.\$(OBJDIR)\$(CURDIR)$(*B)
+!endif
         -Fe.\$(OBJDIR)\
         -Fo.\$(OBJDIR)\
         $(CURDIR)$(*B).cpp