Vulkan: Use thread-local space for EGL errors The assumption in anglebug.com/3041 that ANGLE is "single-threaded anyway" no longer holds. Bug: angleproject:3041 Change-Id: I613395c8003cad60764362d2776aaf7b6804b788 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4468107 Reviewed-by: Igor Nazarov <i.nazarov@samsung.com> Reviewed-by: Charlie Lao <cclao@google.com> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>