Summary:
This diff runs CLANGFORMAT lint on FlipperKit. I have added CLANGFORMAT as the lint engined for objc files in xplat/sonar. Right now the iOS folder is not formatted according to CLANGFORMAT.
Ran `arc lint -a --paths-cmd "find ./iOS/FlipperKit -type f" --verbose`
Reviewed By: passy
Differential Revision: D19942170
fbshipit-source-id: af677323af4edb761f61f8f7e289cab743aa31f2
ca513cf370