Fix build in absence of SSE support Bug: angleproject:8536 Change-Id: Ic74c775b9291fb6bb75adcaeeab0a5f01c2cfa3b Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5296385 Commit-Queue: Roman Lavrov <romanl@google.com> Auto-Submit: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Roman Lavrov <romanl@google.com>