[ct] Fix ct-scaffold chromium_perf link.
[ct] Fix ct-scaffold chromium_perf link.

Change-Id: I3807eb8c0b4b16ba2f81cc4db4a8f0f41eefb637
Reviewed-on: https://skia-review.googlesource.com/c/buildbot/+/298739
Auto-Submit: Weston Tracey <e7e27cb74e46abd7b999223aa4f27901ab7e58c6@google.com>
Reviewed-by: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>
Commit-Queue: Ravi Mistry <9fa2e7438b8cb730f96b74865492597170561628@google.com>

google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot,google/skia-buildbot