layer.conf: update compat to warrior
layer.conf: update compat to warrior

Outcome of the new codename "warrior" update:
https://www.mail-archive.com/openembedded-core@lists.openembedded.org/msg121571.html

Signed-off-by: Vishal Bhoj <2a22f1722dc00af78991d26b76a10a933feb6cc6@linaro.org>

96boards/meta-rpb,96boards/meta-rpb