Add min/max/clamp/saturate intrinsics to ByteCodeGenerator

Change-Id: I357f9b0d3f2c8315b67a9ead6ddbb6633524ec3d
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/287577
Commit-Queue: Brian Osman <brianosman@google.com>
Reviewed-by: Mike Klein <mtklein@google.com>
6 files changed