fixed VK geometry shaders

Bug: skia:
Change-Id: Ia26a99a6b85dba97e259525c4af0f4bdc464d804
Reviewed-on: https://skia-review.googlesource.com/c/184561
Reviewed-by: Chris Dalton <csmartdalton@google.com>
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
2 files changed