layer: bump priority to 8
layer: bump priority to 8

To ensure that meta-virt versions are chosen over meta-oe equivalents we
bump the priority to 8.

Signed-off-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@windriver.com>

cjp256/meta-virtualization,fbertux/meta-virtualization,cardoe/meta-virtualization,fbertux/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,lgirdk/meta-virtualization,cardoe/meta-virtualization,lgirdk/meta-virtualization,fbertux/meta-virtualization,cjp256/meta-virtualization,cardoe/meta-virtualization,cjp256/meta-virtualization,lgirdk/meta-virtualization