This is needed elsewhere.
Rename location.go to paths.go, as this is really dealing with file
paths.
Bug: dawn:1342
Change-Id: Ifdbfafc0fd763ac7ec2b8f692efc35772c4793da
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/87704
Reviewed-by: Antonio Maiorano <amaiorano@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>