Move necko to tier_gecko, r=bsmedberg

netwerk/build.mk

@@ -45,10 +45,7 @@ ifndef tier_xpcom_dirs
 include $(topsrcdir)/xpcom/build.mk
 endif
 
-TIERS += zlib \
-	necko \
-	$(NULL)
-
+TIERS += zlib
 
 ifndef MOZ_NATIVE_ZLIB
 tier_zlib_dirs	+= modules/zlib

toolkit/toolkit-tiers.mk

@@ -81,6 +81,7 @@ tier_gecko_dirs += ipc
 endif
 
 tier_gecko_dirs += \
+		$(tier_necko_dirs) \
 		js/src/xpconnect \
 		intl/chardet \
 		$(NULL)