Fix intra-GCE task scheduler URL.
Fix intra-GCE task scheduler URL.

BUG=skia:6167
NOTRY=true

Change-Id: I14f736720d6743237c65fed4f1e050960e0c0a93
Reviewed-on: https://skia-review.googlesource.com/7628
Commit-Queue: Ben Wagner <3ef7217be91069877d94f7907ce5479000772cd3@google.com>
Reviewed-by: Ben Wagner <3ef7217be91069877d94f7907ce5479000772cd3@google.com>
Reviewed-by: Eric Boren <0e499112533c8544f0505ea0d08394fb5ad7d8fa@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