Bump to xamarin-android-tools/master/9e78d6e (#2074)

jonathanpeppers · grendello · commit 32007a1d72df · 2018-08-17T18:22:05.000+02:00
Context; dotnet/android-tools@917d3b3...9e78d6e Fixes for OpenJDK: dotnet/android-tools#43 dotnet/android-tools#45 Better logging: dotnet/android-tools#46 Fix for missing JDKs on MacOS: dotnet/android-tools#48 Tests now pass on Windows: dotnet/android-tools#47
diff --git a/external/xamarin-android-tools b/external/xamarin-android-tools
@@ -1 +1 @@
-Subproject commit 917d3b3ce455eed6a4a0e4271d34661bdf0b261d
+Subproject commit 9e78d6ee586b498d0ea082b3bc00432c23583dd1
