Previously the pre-commit would require a correct copyright header on all files, including modified files that only have a couple lines changed. Now, a correct copyright file header is only required on new files added to the repository. Test-Information: Changed git author information to a new user and tried committing a changed file, and afterwards a new file. Only the commit of a new file failed due to missing copyright header. It was accepted after setting BSD header. Change-Id: I8e1324846fd904a72728e7c01da4c98f49a77282