Fix bug handling CMYK images without color profiles

We need the swizzler to convert CMYK->RGB in some
cases where we do have a color xform.

BUG=skia:

Change-Id: Id467ad03df64368fd5a6c3bd5461566582eb492e
Reviewed-on: https://skia-review.googlesource.com/8973
Commit-Queue: Matt Sarett <msarett@google.com>
Reviewed-by: Leon Scroggins <scroggo@google.com>
6 files changed