security: apparmor: Label externalDataStore
security: apparmor: Label externalDataStore

Teach virt-aa-helper how to label a qcow2 data_file, tracked internally
as externalDataStore. It should be treated the same as its sibling
disk image

Reviewed-by: Christian Ehrhardt <48da28e2c2cd455d60e19b14c46925e20a3c5d5b@canonical.com>
Signed-off-by: Cole Robinson <7cd45ff6ad1fb7cf556a02797d774247851499f8@redhat.com>

fabianfreyer/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,jfehlig/libvirt,nertpinx/libvirt,nertpinx/libvirt,zippy2/libvirt,jardasgit/libvirt,libvirt/libvirt,olafhering/libvirt,jardasgit/libvirt,fabianfreyer/libvirt,libvirt/libvirt,jardasgit/libvirt,jfehlig/libvirt,olafhering/libvirt,crobinso/libvirt,zippy2/libvirt,fabianfreyer/libvirt,nertpinx/libvirt,jfehlig/libvirt,olafhering/libvirt,jfehlig/libvirt,nertpinx/libvirt,libvirt/libvirt,crobinso/libvirt,crobinso/libvirt,zippy2/libvirt,zippy2/libvirt,olafhering/libvirt,fabianfreyer/libvirt,libvirt/libvirt,nertpinx/libvirt,crobinso/libvirt,jardasgit/libvirt