One should never add a backup file ending in with ~ to the git repository.

Signed-off-by: Niklaus Giger <niklaus.giger@netstal.com>

Signed-off-by: Mike Frysinger <vapier@gentoo.org>

based on Linux source tree's .gitignore files

Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Kim Phillips <kim.phillips@freescale.com>