If the inlcude headers aren't sorted alphabetically, then the
logical choice is to append new ones, however that creates a
lot of potential for conflicts or duplicates because every change
will then add new includes in the same location.
Signed-off-by: NYuan Yao <yao.yuan@freescale.com>
Signed-off-by: NWolfram Sang <wsa@the-dreams.de>