Fix check for GLES sized Lum8 support.

Bug: skia:14247
Change-Id: I86f32454e8fb4fc99fb967e7d953ecde329f8596
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/670180
Auto-Submit: Greg Daniel <egdaniel@google.com>
Commit-Queue: Nicolette Prevost <nicolettep@google.com>
Reviewed-by: Nicolette Prevost <nicolettep@google.com>
(cherry picked from commit b0c40a307d34a229b789420f5f149d734d84e47c)
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/670957
Commit-Queue: Leon Scroggins <scroggo@google.com>
1 file changed