Minor fixes to SkSL precisions

No-Presubmit: true
No-Tree-Checks: true
Bug: skia:
Change-Id: Ife95d3ba457f79c00bf4fdd54af898a3a50402aa
Reviewed-on: https://skia-review.googlesource.com/47241
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
3 files changed