Add support for <<, >>, &, |, ^, and their compound assignment variants
<<=, >>=, &=, |=, ^=. Also add support for bitwise not (~).

BUG=angle:870

Change-Id: I5e6a835409589556d5d58d58078fdf505cfd8da5
Reviewed-on: https://chromium-review.googlesource.com/241850Tested-by: Olli Etuaho <oetuaho@nvidia.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>