Make xplat react native files buildable

Reviewed By: mzlee

Differential Revision: D6605611

fbshipit-source-id: baa33947319a27b95020924d177a9398a276dabe

Author: Jonathan Kim

android/app/BUCK

@@ -1,6 +1,6 @@
-include_defs("//ReactAndroid/DEFS")
+load("//ReactNative:DEFS", "rn_android_library", "rn_android_binary", "rn_android_resource", "react_native_dep", "react_native_target")
 
-android_binary(
+rn_android_binary(
     name = "app",
     keystore = "//keystores:debug",
     manifest = "src/main/AndroidManifest.xml",
@@ -9,7 +9,7 @@ android_binary(
     ],
 )
 
-android_library(
+rn_android_library(
     name = "rntester-lib",
     srcs = glob(["src/main/java/**/*.java"]),
     deps = [
@@ -26,7 +26,7 @@ android_library(
     ],
 )
 
-android_resource(
+rn_android_resource(
     name = "res",
     package = "com.facebook.react.uiapp",
     res = "src/main/res",