meta-security-smack: layer.conf: set LAYERSERIES_COMPAT
meta-security-smack: layer.conf: set LAYERSERIES_COMPAT

Set LAYERSERIES_COMPAT to indicate that this layer is compatible with
both the rocko and sumo branches.

Signed-off-by: Paul Eggleton <737d4dae46a541673d7bf4e0d5b32714b16528d8@linux.intel.com>

01org/meta-intel-iot-security,01org/meta-intel-iot-security,01org/meta-intel-iot-security,01org/meta-intel-iot-security