SkSL now supports ternary lvalues

Bug: skia:
Change-Id: I859b756fe016f80c7a94f812623a16b4865204ba
Reviewed-on: https://skia-review.googlesource.com/96680
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
5 files changed