The change to use `go run` over `go build` has upset the windows kokoro builds.
Use absolute paths.
Change-Id: Id9700529b3460a5ab579f82f616a95c3498c152c
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/118722
Kokoro: Kokoro <noreply+kokoro@google.com>
Auto-Submit: Ben Clayton <bclayton@google.com>
Commit-Queue: James Price <jrprice@google.com>
Reviewed-by: James Price <jrprice@google.com>