xen: resolve issue when using sstate cache
xen: resolve issue when using sstate cache

When using an sstate cache xen/xen.gz was not being installed into the
image.

Signed-off-by: Doug Goldstein <8172f793ca553050868d487fd13b508d19cae503@cardoe.com>
Signed-off-by: Bruce Ashfield <284cc737d174a260eec2a2a6324a304f84b1ae0f@windriver.com>

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