Added mozilla/dist/include to INCLUDES because Mozilla's WIN32 build

has changed to export headers to that directory, so nss needs to get
the dbm headers (e.g., mcom_db.h) from there.  We should think about
what is the best long term solution to this problem (where to export
and get headers).

security/coreconf/headers.mk

@@ -52,3 +52,11 @@ endif
 #
 
 INCLUDES += -I$(SOURCE_XPPRIVATE_DIR)
+
+#
+#  Mozilla WIN32 build exports headers to mozilla/dist/include
+#
+
+ifeq ($(MOZ_BITS),32)
+INCLUDES += -I$(SOURCE_XP_DIR)/include
+endif