[mtouch] Properly link with CoreAudioKit when not using simlauncher. (#49)

Also bump maccore to get new test.

commit xamarin/maccore@eb9c34d875
Author: Rolf Bjarne Kvinge <rolf@xamarin.com>
Date:   Fri May 13 12:46:04 2016 +0200

    [monotouch-test] Add test to ensure mtouch properly links with CoreAudioKit when not using simlauncher.

mk/xamarin.mk

@@ -1,5 +1,5 @@
 ifdef ENABLE_XAMARIN
-NEEDED_MACCORE_VERSION := 0b6c9c86bd31de83817b51290885e217dbdd6aa4
+NEEDED_MACCORE_VERSION := eb9c34d8752ccbc74eafe267232c4c77ba8f631f
 NEEDED_MACCORE_BRANCH := master
 
 MACCORE_DIRECTORY := maccore

tools/mtouch/mtouch.cs

@@ -834,6 +834,10 @@ namespace Xamarin.Bundler
 						// framework specific processing
 						switch (framework.Name) {
 						case "CoreAudioKit":
+							// CoreAudioKit seems to be functional in the iOS 9 simulator.
+							if (app.IsSimulatorBuild && SDKVersion.Major < 9)
+								continue;
+							break;
 						case "Metal":
 						case "MetalKit":
 						case "MetalPerformanceShaders":