Add back glslang include check The issue was fixed upstream by https://github.com/KhronosGroup/glslang/pull/2362 Bug: angleproject:4763 Change-Id: Icc9af01097b1d97653eb15b640eed6bd72365fd1 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2337349 Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>