implement ARM saturating multiply using ssse3

Change-Id: I530373e9b53e76a7cd1c0b3a5a1b05354975790c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/446186
Reviewed-by: Brian Osman <brianosman@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed