Fix version check for vulkan layers

Bug: skia:
Change-Id: I9520899c4b86d6436e3697d0cc6358c2b8641169
Reviewed-on: https://skia-review.googlesource.com/114686
Reviewed-by: Ethan Nicholas <ethannicholas@google.com>
Commit-Queue: Greg Daniel <egdaniel@google.com>
1 file changed