There were actually three missing state synchronization points:

1. When re-binding a uniform buffer, we had no dirty bits.
2. When modifying the Program bindings, we also had no update.
3. When triggering a dependent state update via BufferData.

This fixes all the missing syncs and adds tests for the cases.

Bug: angleproject:1390
Change-Id: I2f05766545784248bcca8308ae34ac5720237ab1
Reviewed-on: https://chromium-review.googlesource.com/823150
Commit-Queue: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
Reviewed-by: Kai Ninomiya <kainino@chromium.org>
Reviewed-by: Jamie Madill <jmadill@chromium.org>