Intel Linux graphics drivers before kernel 5.0 can hang when allocating
large textures. Limit the texture size as a workaround.

Bug: chromium:927470
Change-Id: Ic8c14235396492efafd663b1cd012fd752427992
Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1700146
Commit-Queue: Jonah Ryan-Davis <jonahr@google.com>
Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
Reviewed-by: Geoff Lang <geofflang@chromium.org>