Roll src/third_party/catapult/ 06af11370..956b57099 (2 commits).

https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/06af1137071d..956b570999cf

$ git log 06af11370..956b57099 --date=short --no-merges --format='%ad %ae %s'
2016-08-24 nednguyen [tracing] Fix implementation of TTI when new nav is detected
2016-08-24 benjhayden Migrate sampleMetric from ScalarNumeric to Histogram

BUG=630300

TBR=catapult-sheriff@chromium.org

Review-Url: https://codereview.chromium.org/2280473003
Cr-Commit-Position: refs/heads/master@{#414320}

DEPS

@@ -92,7 +92,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling catapult
   # and whatever else without interference from each other.
-  'catapult_revision': '06af1137071d3effc584bb0bff9d9cf90829a901',
+  'catapult_revision': '956b570999cf7940a378b57cab8153f75b87d4d0',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.