Bug 71323: Add dist/include to include path for MOZILLA_CLIENT builds

r=relyea

security/coreconf/WIN32.mk

@@ -93,6 +93,9 @@ DEFINES += -DWIN32
 #
 
 DEFINES += -D_WINDOWS
+ifdef MOZILLA_CLIENT
+INCLUDES += -I$(SOURCE_XP_DIR)/include
+endif
 
 # override default, which is ASFLAGS = CFLAGS
 AS	= ml.exe

security/coreconf/source.mk

@@ -40,9 +40,6 @@
 #
 
 SOURCE_PREFIX = $(CORE_DEPTH)/../dist
-ifdef MOZILLA_CLIENT
-SOURCE_PREFIX = $(CORE_DEPTH)/../mozilla/dist
-endif
 
 #
 # <user_source_tree> cross-platform (xp) master import/export directory