Fix spec reference

The reference changed to be version neutral.

Bug: 803774
Change-Id: Ia42664ef48867f1e4eace73b1cb787a6bd4250fa
Reviewed-on: https://chromium-review.googlesource.com/c/1461880
Commit-Queue: Kouhei Ueno <kouhei@chromium.org>
Reviewed-by: Kouhei Ueno <kouhei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#631016}
1 file changed