Support equality between structs containing arrays in HLSL output This requires sorting all equality functions together so that struct equality functions can have dependencies on array equality functions, but support for array equality functions that have dependencies on struct equality functions is also maintained. There's no automated test coverage for this specifically. The change was tested by manually inspecting shader output and ensuring that there were no test regressions in tests listed below. TEST=dEQP-GLES3.functional.shaders.* BUG=angleproject:954 Change-Id: If7199ab2446804afae50f103bb625101172882b9 Reviewed-on: https://chromium-review.googlesource.com/261550 Reviewed-by: Olli Etuaho <oetuaho@nvidia.com> Tested-by: Olli Etuaho <oetuaho@nvidia.com>