Update header list for spirv-tools

Change-Id: I92fd8dbdc5fc1f2a3e52c1fcda7b5740d8978219
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/280608
Reviewed-by: Mike Klein <mtklein@google.com>
Reviewed-by: Sean Gilhuly <sgilhuly@chromium.org>
Auto-Submit: Herb Derby <herb@google.com>
Commit-Queue: Herb Derby <herb@google.com>
1 file changed