Avoid comma usage in Operators test.

This works around a GLSL compilation bug on the Tecno Spark 3 Pro.

Change-Id: I516bd64745a8e99cccc87ee4bb2e1f5d5b26c130
Bug: skia:11255
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/364116
Commit-Queue: Robert Phillips <robertphillips@google.com>
Auto-Submit: John Stiles <johnstiles@google.com>
Reviewed-by: Robert Phillips <robertphillips@google.com>
4 files changed