Document .gitignore split
Document .gitignore split

This is taken verbatim from the linux kernel .gitignore

Signed-off-by: Eduardo Lima (Etrunko) <bf50f4f8e28a384aa002f367e1f3608d165ff6d4@intel.com>

FlorentRevest/Enlightenment,tizenorg/platform.upstream.enlightenment,tasn/enlightenment,tasn/enlightenment,tasn/enlightenment,rvandegrift/e,FlorentRevest/Enlightenment,FlorentRevest/Enlightenment,rvandegrift/e,tizenorg/platform.upstream.enlightenment,tizenorg/platform.upstream.enlightenment,rvandegrift/e