update internal code attribution

Summary:
Internal code attribution labeling update.

Changelog: [Internal]

Reviewed By: zlern2k

Differential Revision: D21696075

fbshipit-source-id: ef689a6367e1dddfffbbefb52a6aead2c91bfefe

Author: fkgozali

ReactCommon/fabric/components/art/BUCK

@@ -44,11 +44,10 @@ rn_xplat_cxx_library(
         "-Wall",
     ],
     cxx_tests = [":tests"],
-    fbandroid_labels = ["supermodule:android/default/public.react_native.infra"],
     fbobjc_compiler_flags = APPLE_COMPILER_FLAGS,
-    fbobjc_labels = ["supermodule:ios/default/public.react_native.infra"],
     fbobjc_preprocessor_flags = get_preprocessor_flags_for_build_mode() + get_apple_inspector_flags(),
     force_static = True,
+    labels = ["supermodule:xplat/default/public.react_native.playground"],
     platforms = (ANDROID, APPLE, CXX),
     preprocessor_flags = [
         "-DLOG_TAG=\"ReactNative\"",