GLSL uses not() for vectors, and ! for scalars.
Bug: tint:1444
Change-Id: I7fa9bdf0b546224737f9cda18428dea7051fe9e5
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/82362
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Stephen White <senorblanco@chromium.org>