i965: Re-emit depth/stencil/hiz on BRW_NEW_AUX_STATE

Certain things can change the aux usage or fast clear color of a depth
surface and we want to re-emit if that happens.  For instance, if you do
a fast depth clear of an already clear depth surface, we will just set
the clear color and not do anything else.  In that case, we could fail
to re-emit 3DSTATE_CLEAR_PARAMS and not get the new fast-clear color.

Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>

src/mesa/drivers/dri/i965/gen7_misc_state.c

@@ -195,7 +195,8 @@ const struct brw_tracked_state gen7_depthbuffer = {
       .mesa = _NEW_BUFFERS |
               _NEW_DEPTH |
               _NEW_STENCIL,
-      .brw = BRW_NEW_BATCH |
+      .brw = BRW_NEW_AUX_STATE |
+             BRW_NEW_BATCH |
              BRW_NEW_BLORP,
    },
    .emit = brw_emit_depthbuffer,