[graphite] Make RuntimeEffect precompilation match the rest of the system

The rest of the precompilation system will interpret:
   { x, y }, { z, w }
to be: xz, xw, yz, yw

while the precompile runtime effects would've interpreted that as:
   xy, zw

Bug: b/332690425
Change-Id: Ic415b83d24200de9de05b03d888c69b9af01a998
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/871276
Commit-Queue: Robert Phillips <robertphillips@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
5 files changed