Roll src/third_party/catapult/ 3cc40b373..596285fbd (1 commit).

https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/3cc40b373729..596285fbd59f

$ git log 3cc40b373..596285fbd --date=short --no-merges --format='%ad %ae %s'
2016-09-15 petrcermak [tracing] Limit scalar span sparkline's negative z-index to the span only

TBR=catapult-sheriff@chromium.org

Review-Url: https://codereview.chromium.org/2343803005
Cr-Commit-Position: refs/heads/master@{#418943}

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': '3cc40b37372927435ed69f91aec2117488b0825c',
+  'catapult_revision': '596285fbd59f28cc71549ba6c90f726523a19d98',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.