vk: Fix geometry-shader input varying locations

Bug: skia:
Change-Id: I60e0c25fa05ea53b0969fdee54620bec639ae159
Reviewed-on: https://skia-review.googlesource.com/24440
Reviewed-by: Greg Daniel <egdaniel@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
1 file changed