Make it easier to add vector versions of byte code instructions

I'm about to add more of these, wanted to land this first.

Change-Id: Ic7ec30f531456075b1f9032f1f07cc54d234af95
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/272527
Auto-Submit: Brian Osman <brianosman@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
1 file changed