add rotate to SkM44

Declares that Skia is right-handed

Change-Id: Ie98773f0f0d748eadc0d1abcd860f6e8dbb56bcf
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/266564
Commit-Queue: Mike Reed <reed@google.com>
Reviewed-by: Michael Ludwig <michaelludwig@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
4 files changed