Add gradle wrapper

Reviewed By: astreet

Differential Revision: D2590921

fb-gh-sync-id: cf870c96f772c06e1a8b69014ebd906978ea8c00

ReactAndroid/src/main/java/com/facebook/jni/BUCK

@@ -0,0 +1,17 @@
+include_defs('//ReactAndroid/DEFS')
+
+android_library(
+  name = 'jni',
+  srcs = glob(['**/*.java']),
+  deps = [
+    react_native_dep('java/com/facebook/proguard/annotations:annotations'),
+    react_native_dep('libraries/soloader/java/com/facebook/soloader:soloader'),
+  ],
+  visibility = [
+    'PUBLIC',
+  ],
+)
+
+project_config(
+  src_target = ':jni',
+)