Bump maccore and guiunit to HEAD (#3098)

There's a separate PR for mono https://github.com/xamarin/xamarin-macios/pull/3082
2017-12-14 09:48:37 -05:00 · 2017-12-14 09:48:37 -05:00 · bb330468ec
--- a/external/guiunit
+++ b/external/guiunit
@ -1 +1 @@
-Subproject commit 54f599934319558e391d4c6b89ad7e85d4f95366
+Subproject commit 1306b0d420bd69efcd8f1951c5c68dc7065ce9eb
--- a/mk/xamarin.mk
+++ b/mk/xamarin.mk
@ -1,5 +1,5 @@
 ifdef ENABLE_XAMARIN
-NEEDED_MACCORE_VERSION := f819228d476cf49b04b2f23469a1ea10a5779a84
+NEEDED_MACCORE_VERSION := a90f7996fe74c948545d72831d33d2872501ad40
 NEEDED_MACCORE_BRANCH := master

 MACCORE_DIRECTORY := maccore