Fix the name of the Windows SDK, for real this time

toolkit/mozapps/installer/packager.mk

@@ -105,7 +105,7 @@ ifeq ($(MOZ_PKG_FORMAT),ZIP)
 PKG_SUFFIX	= .zip
 MAKE_PACKAGE	= $(ZIP) -r9D $(PACKAGE) $(MOZ_PKG_APPNAME)
 UNMAKE_PACKAGE	= $(UNZIP) $(UNPACKAGE)
-MAKE_SDK = $(ZIP) -r9D $(SDK_SUFFIX) $(MOZ_APP_NAME)-sdk
+MAKE_SDK = $(ZIP) -r9D $(SDK) $(MOZ_APP_NAME)-sdk
 endif
 ifeq ($(MOZ_PKG_FORMAT),DMG)
 ifndef _APPNAME