Added A2B support to colorspaceinfo tool

Tool now parses A2B images/profiles.
Tool can now display a cross-section based visualization for the color
look-up tables in A2B profiles.

BUG=skia:

Change-Id: I68abb3e947b080c533e283783d7859feea8d35d6
Reviewed-on: https://skia-review.googlesource.com/6119
Commit-Queue: Matt Sarett <msarett@google.com>
Reviewed-by: Matt Sarett <msarett@google.com>
3 files changed