The spec states that glViewport() silently clamps the viewport
width and height to GL_MAX_VIEWPORT_DIMS[0] and
GL_MAX_VIEWPORT_DIMS[1], respectively.

Bug b/34078120

Change-Id: Ifeec0d6b601ce8a3825796fa551eea1f46150002
Reviewed-on: https://swiftshader-review.googlesource.com/8371Reviewed-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>
Tested-by: Nicolas Capens <capn@google.com>