i965/draw: Set NEW_AUX_STATE when draw aux changes

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104411
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=104383


Fixes: ea0d2e98
Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Topi Pohjolainen <topi.pohjolainen@intel.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
(cherry picked from commit 20f70ae3)