Cleanup files

Summary:
This repository has been prepared on FreeBSD, Windows and Linux,
so it mixes encoding and whitelines. We switch to a UNIX standard.

Ensure each file has an UTF-8 encoding, without BOM, with a final \n.

Test Plan: no op

Reviewers: dereckson

Reviewed By: dereckson

Differential Revision: https://devcentral.nasqueron.org/D1918