If .hob exists, hob takes the variable from there. Change to not override anymore
the variables which comes from bblayers.conf and local.conf
[YOCTO #2934]
(Bitbake rev: 00533e83038e3d5e3cd5d1be73c45afece92ec0c)
Signed-off-by: Cristiana Voicu <cristiana.voicu@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>