Update .gitignore
diff --git a/.gitignore b/.gitignore
index 3683bee..5d5849b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -100,6 +100,7 @@ VisualC-GDK/**/Layout
# for Android
android-project/local.properties
+android-project/.gradle/
test/checkkeys
test/checkkeysthreads