xplat code ownership
xplat code ownership

Summary:
For internal code attribution.

Changelog: [Internal]

Reviewed By: zlern2k

Differential Revision: D21496969

fbshipit-source-id: 9fa27a758df19c16fd2087ce964132eaa70dc91f

janicduplessis/react-native,facebook/react-native,hoangpham95/react-native,javache/react-native,pandiaraj44/react-native,arthuralee/react-native,pandiaraj44/react-native,janicduplessis/react-native,facebook/react-native,pandiaraj44/react-native,facebook/react-native,pandiaraj44/react-native,javache/react-native,myntra/react-native,janicduplessis/react-native,facebook/react-native,myntra/react-native,facebook/react-native,javache/react-native,javache/react-native,myntra/react-native,myntra/react-native,arthuralee/react-native,pandiaraj44/react-native,hoangpham95/react-native,arthuralee/react-native,janicduplessis/react-native,hoangpham95/react-native,hoangpham95/react-native,facebook/react-native,javache/react-native,hoangpham95/react-native,pandiaraj44/react-native,myntra/react-native,facebook/react-native,javache/react-native,javache/react-native,myntra/react-native,facebook/react-native,janicduplessis/react-native,janicduplessis/react-native,hoangpham95/react-native,arthuralee/react-native,pandiaraj44/react-native,myntra/react-native,facebook/react-native,arthuralee/react-native,janicduplessis/react-native,pandiaraj44/react-native,hoangpham95/react-native,hoangpham95/react-native,myntra/react-native,javache/react-native,myntra/react-native,javache/react-native,janicduplessis/react-native