Roll src/third_party/catapult/ 9f0befafc..e979fa345 (1 commit).

https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/9f0befafcd15..e979fa345e7e

$ git log 9f0befafc..e979fa345 --date=short --no-merges --format='%ad %ae %s'
2016-09-20 eakuefner [Dashboard] Simplify GuessMetric

CQ_INCLUDE_TRYBOTS=master.tryserver.chromium.android:android_optional_gpu_tests_rel
TBR=catapult-sheriff@chromium.org

Review-Url: https://codereview.chromium.org/2356843003
Cr-Commit-Position: refs/heads/master@{#419933}