update glgen to take into account recent changes

- it looks like UserId has been renamed to UserHandle in the
framework.
- also for some reason I don't understand glgen didn't seem
to be up to date with respect to the generated bindings in the tree.
It's like the bindings were generated with a more recent version of
glgen (maybe it was never checked in). So we fix that here.

Change-Id: Ie49522ebf67fcab9213246b4d93500e37a3cbc05