Initialize display TLS at thread creation time Bug: chromium:1441754 Change-Id: I611c6f591f2a6d3439e3c5d1250e2fde996c0ecf Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4496673 Reviewed-by: Geoff Lang <geofflang@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>