Fix stub compilation for -showAnnotations (e.g. system api etc)

Test: Manual compilation
Bug: N/A

Change-Id: I79dff3a876a1074fa9291a37fcb991669460ee49
diff --git a/.gitignore b/.gitignore
index dd93b08..2e527fd 100644
--- a/.gitignore
+++ b/.gitignore
@@ -4,6 +4,7 @@
 /.idea/modules.xml
 /.idea/workspace.xml
 /.idea/runConfigurations
+/.idea/usage.statistics.xml
 /out
 build/
 stub-annotations/out