Change sRGB and XYZD50 profiles to functions

By only exporting functions, shared-library building on Windows is
significantly simpler (no need to dllimport).

See also: https://skia-review.googlesource.com/c/skia/+/124983

Change-Id: I916b77b8cb4f54d2e087e3e8c78ad4459c7ee927
Reviewed-on: https://skia-review.googlesource.com/124982
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@chromium.org>
4 files changed