Makes the QUALIFIER macro take arguments similar to LAYOUT, to allow
passing in tokens to be conditionally output after the storage
qualifier.

Bug: angleproject:3561
Change-Id: I4368eba2c34c1398f81d33cd23c9e56557fd4ed8
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1685876
Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Tim Van Patten <timvp@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>