Restore SELinux context for p11-kit config overrides
    
    When 74e09087 started disabling softshm2 module in p11-kit-proxy,
    we missed to restore SELinux context on the configuration override
    creation.
    
    We don't need an explicit restore_context() when removing the override
    because restore_file() already calls restore_context().
    
    Related: https://pagure.io/freeipa/issue/7810
    Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
    Reviewed-By: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>