Re-purpose color space tool

Re-purpose color space tool

(1) Compile tool with GN.
(2) Rename tool to colorspaceinfo.
(3) Support both images and icc profiles as input.
(4) Print out information on transfer fn in addition to gamut.

TODO: Output graphs of the three transfer fn curves.

BUG=skia:

GOLD_TRYBOT_URL= https://gold.skia.org/search?issue=4721

Change-Id: I2e75139685ea41446d3ae6f9803c8068ea05661a
Reviewed-on: https://skia-review.googlesource.com/4721
Commit-Queue: Matt Sarett <msarett@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
Reviewed-by: Brian Osman <brianosman@google.com>