Fixes:
 * conformance/glsl/functions/glsl-function*

BUG=angleproject:883

Change-Id: I22a528c6ba4c4077ba47269e14396b4117d1c849
Reviewed-on: https://chromium-review.googlesource.com/273169Tested-by: Geoff Lang <geofflang@chromium.org>
Reviewed-by: Brandon Jones <bajones@chromium.org>