Add hostname to loading banner on iOS
Add hostname to loading banner on iOS

Summary:
This diff adds a hostname to the loading banner on iOS so it's clear which server you're loading from.

Changelog: [Added] [iOS] Added hostname to loading banner.

Reviewed By: PeteTheHeat

Differential Revision: D21280252

fbshipit-source-id: d7733c056f5fb63e32b247a4fa1476ab42c7da17

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