Fix argument names and documentation for SkMatrix44::set3x3()

Column-major is an implementation choice, not an interface. There is
exactly one acceptable subscript notation for indexing matrix elements,
and it's row first, then column. Having these named backwards was
unnecessarily confusing.

Note that this doesn't alter behavior in any way, it just brings this
function in line with expectations from any reasonable mathematician.

Change-Id: Ie4ceb40281ef507889d25403afbf24116514c45a
Reviewed-on: https://skia-review.googlesource.com/122790
Reviewed-by: Brian Salomon <bsalomon@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
2 files changed