The OpenCL CTS assumes that libOpenCL has symbols for all versions as it
usually expects to link against the Khronos loader. Since we're not
using that, we have to expose all the symbols it wants, whether we
intend to implement all versions or not. All the 2.x stuff will likely
remain stubs forever as it is made optional again in 3.0.

In the generator scripts, work around a small issue where one function
takes an array-typed parameter, which confused just_the_name and
produced invalid code.

Bug: angleproject:5819
Change-Id: I6c3591dc9229c5276f14ff66ee3ee6362e8bf622
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2807531
Commit-Queue: Chris Forbes <chrisforbes@google.com>
Reviewed-by: Jamie Madill <jmadill@chromium.org>
Reviewed-by: John Plate <jplate@google.com>