force wasm into N=1 transform code paths

While the N=4 vector path should logically work with wasm SIMD,
it doesn't in practice.  More detail on the bug.

Bug: skia:8045
Change-Id: I61c7a47409d7778bba1bd9d184fe60340f215431
Reviewed-on: https://skia-review.googlesource.com/132220
Auto-Submit: Mike Klein <mtklein@chromium.org>
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Brian Osman <brianosman@google.com>
1 file changed