65845: sr=leaf r=waterson.

don't do coverage analysis for the xpidl stuff.  Slows building horribly

xpcom/typelib/xpidl/makefile.win

@@ -54,6 +54,8 @@ LLIBS=                         \
 
 LLFLAGS= $(LLFLAGS) -SUBSYSTEM:CONSOLE -NODEFAULTLIB:MSVCRTD
 
+MOZ_NO_COVERAGE=1
+
 include <$(DEPTH)\config\rules.mak>
 
 export:: $(PROGRAM)

xpcom/typelib/xpt/src/makefile.win

@@ -38,6 +38,8 @@ LINCS = \
 	-I$(PUBLIC)\xpcom	\
 	$(NULL)
 
+MOZ_NO_COVERAGE=1
+
 include <$(DEPTH)\config\rules.mak>
 
 export:: $(LIBRARY)