libconfig: moved in recipes-extended as in meta-oe

Signed-off-by: Stefano Babic <sbabic@denx.de>
libconfig: inherit from autotools-brokensep

do_compile fails otherwise

Signed-off-by: Andrea Galbusera <gizero@gmail.com>
Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
mtd-utils: make bbappend version independent

Signed-off-by: Stefano Babic <sbabic@denx.de>