fixed creating a vector from another vector in SPIR-V output

Bug: skia:
Change-Id: I9d45e5f9c3f44f41de9bcde08491b006eb2e752f
Reviewed-on: https://skia-review.googlesource.com/100182
Commit-Queue: Ethan Nicholas <ethannicholas@google.com>
Reviewed-by: Jim Van Verth <jvanverth@google.com>
1 file changed