expire_reflog(): move updateref to flags argument
expire_reflog(): move updateref to flags argument

The policy objects don't care about "--updateref". So move it to
expire_reflog()'s flags parameter.

Signed-off-by: Michael Haggerty <c24c152f145c57791e809b126db9e61bd1c1782d@alum.mit.edu>
Reviewed-by: Stefan Beller <a7f3b1612c245dae606b3b9617b4f52187fddb65@google.com>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git