I added a FIXME in the code because EvqFragmentOut
hadn't been added yet, since this has now been done,
I can remove the comment to address the FIXME.

Change-Id: I67f4371802eb0e30278b3eaafab238a20798ae69
Reviewed-on: https://swiftshader-review.googlesource.com/3502Tested-by: Alexis Hétu <sugoi@google.com>
Reviewed-by: Nicolas Capens <capn@google.com>