test sRGB TF and its inverse

How do we feel about all these commented-out expectations failing?

Change-Id: Ic5a878dc820fb2a5bb3ddd8dc17a66eeefd324e0
Reviewed-on: https://skia-review.googlesource.com/c/177721
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Mike Klein <mtklein@google.com>
1 file changed