CL/VK: Fix default LWS when GWS is less than 64 In the case where LWS is NULL and GWS is smaller than 64, the runtime produces a useless uniform region info. Thus, this change clamps LWS to the GWS to avoid this edge-case. Bug: angleproject:42267067 Change-Id: I418c7d503918f4f082825924b463c266bfd862dc Signed-off-by: kyongjoo.oh <kyongjoo.oh@samsung.com> Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6877794 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Austin Annestrand <a.annestrand@samsung.com>