Merge pull request #2906 from ksmit799/patch-1

[Unity] Ignore .gradle/ build cache

Unity.gitignore

@@ -8,6 +8,9 @@ Assets/AssetStoreTools*
 # Visual Studio cache directory
 .vs/
 
+# Gradle cache directory
+.gradle/
+
 # Autogenerated VS/MD/Consulo solution and project files
 ExportedObj/
 .consulo/