Stop exposing non-square matrices to runtime effects

The SkSL names of these types were inaccessible (in the private symbol
table), but we had inadvertently made them usable via the GLSL aliases.

Bug: skia:10680
Change-Id: I2e22db39c623c872dca837a22ff6f99cf5db46b4
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/368251
Reviewed-by: John Stiles <johnstiles@google.com>
Commit-Queue: Brian Osman <brianosman@google.com>
1 file changed