Branching for d15-4-xi

Make.config

@@ -29,7 +29,7 @@ PACKAGE_HEAD_REV=$(shell git rev-parse HEAD)
 # on wrench, because wrench technically builds hashes, not branches)
 #
 # 
-PACKAGE_HEAD_BRANCH=d15-4
+PACKAGE_HEAD_BRANCH=d15-4-xi
 ifeq ($(BUILD_REVISION),)
 CURRENT_BRANCH:=$(shell git rev-parse --abbrev-ref HEAD)
 else

mk/xamarin.mk

@@ -1,6 +1,6 @@
 ifdef ENABLE_XAMARIN
 NEEDED_MACCORE_VERSION := b4413efc991b853846e142929211b6e519b8672d
-NEEDED_MACCORE_BRANCH := d15-4
+NEEDED_MACCORE_BRANCH := d15-4-xi
 
 MACCORE_DIRECTORY := maccore
 MACCORE_MODULE    := git@github.com:xamarin/maccore.git