GL: Disable clip distance state when unused Some OpenGL drivers experience runtime failures when clip distances are enabled but the program does not statically use them. Bug: angleproject:4452 Change-Id: I90fc4ccf1aa669f1b202a1726be49b1e5401a435 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/4853743 Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org> Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>