expose three more private routines

We'll need these if we want to use skcms_Matrix3x3
and skcms_TransferFunction in Skia.

Change-Id: Ifaa449a3962835313fd7351c247139d844007ee3
Reviewed-on: https://skia-review.googlesource.com/157524
Auto-Submit: Mike Klein <mtklein@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
2 files changed