This cl doesn't actually do anything, but we need to establish
exactly how to add new GLES 3.0 specific cases in Swift Shader.

Change-Id: I7f31ea98e0d24f71204a3e1a7a31bf3379741e15
Reviewed-on: https://swiftshader-review.googlesource.com/2560Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Alexis Hétu <sugoi@google.com>