tune-xscale: replace TUNE_CCARGS for webkit-gtk and cairo only with xscale in TUNE_FEATURES
* without this you'll get different sstate checksum for webkit-gtk and
cairo even when you build them with DEFAULTTUNE == armv5te
* maybe this isn't needed at all anymore or if it is then it should be
applied in arm-armv5.inc for all armv5te devices, not only xscale?
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
