Provide a direct bridge to java based annotation tools

Change-Id: Ie8c1a66310229f454da1e45b50ecc689d07790cf
diff --git a/build.gradle b/build.gradle
index e69de29..f593f80 100644
--- a/build.gradle
+++ b/build.gradle
@@ -0,0 +1,5 @@
+repositories {
+    flatDir {
+        dirs("libs")
+    }
+}