nss: build fails with Win32 make due to backslashes

Change-Id: I9621b3ae12072634a707123ea375f6eb546d9cf9

external/nss/UnpackedTarball_nss.mk

@@ -17,6 +17,7 @@ $(eval $(call gb_UnpackedTarball_add_patches,nss,\
 	external/nss/nss-3.13.5-zlib-werror.patch \
 	external/nss/nss_macosx.patch \
 	external/nss/nss-linux-x86.patch.0 \
+	external/nss/nss-win32-make.patch.1 \
 	$(if $(filter WNTMSC,$(OS)$(COM)),external/nss/nss.windows.patch) \
 	$(if $(filter WNTGCC,$(OS)$(COM)),external/nss/nspr-4.9-build.patch.3 \
 		external/nss/nss-3.13.3-build.patch.3 \

external/nss/nss-win32-make.patch.1

@@ -0,0 +1,20 @@
+--- nss/nss/coreconf/rules.mk.orig2	2014-06-03 15:30:01.667200000 +0200
++++ nss/nss/coreconf/rules.mk	2014-06-03 15:30:14.537200000 +0200
+@@ -259,7 +259,7 @@
+ 	@$(MAKE_OBJDIR)
+ 	rm -f $@
+ ifeq (,$(filter-out _WIN%,$(NS_USE_GCC)_$(OS_TARGET)))
+-	$(AR) $(subst /,\\,$(OBJS))
++	$(AR) $(OBJS)
+ else
+ 	$(AR) cr $@ $(OBJS)
+ endif
+@@ -297,7 +297,7 @@
+ ifdef NS_USE_GCC
+ 	$(LINK_DLL) $(OBJS) $(SUB_SHLOBJS) $(EXTRA_LIBS) $(EXTRA_SHARED_LIBS) $(OS_LIBS) $(LD_LIBS) $(RES)
+ else
+-	$(LINK_DLL) -MAP $(DLLBASE) $(subst /,\\,$(OBJS) $(SUB_SHLOBJS) $(EXTRA_LIBS) $(EXTRA_SHARED_LIBS) $(OS_LIBS) $(LD_LIBS) $(RES))
++	$(LINK_DLL) -MAP $(DLLBASE) $(OBJS) $(SUB_SHLOBJS) $(EXTRA_LIBS) $(EXTRA_SHARED_LIBS) $(OS_LIBS) $(LD_LIBS) $(RES)
+ ifdef MT
+ 	if test -f $@.manifest; then \
+ 		$(MT) -NOLOGO -MANIFEST $@.manifest -OUTPUTRESOURCE:$@\;2; \