selinux: Fix file context definition for /var/run
    
    There is a file context equivalence rule assigning /run the same
    contexts as /var/run. Because of it it's necessary to use /var/run
    instead of /run in file context definitions.
    
    See:
    https://fedoraproject.org/wiki/SELinux/IndependentPolicy#File_contexts_and_equivalency_rules
    
    Signed-off-by: Vit Mojzis <vmojzis@redhat.com>
    Reviewed-By: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Francois Cami <fcami@redhat.com>