Roll src/third_party/catapult/ 6cad5da3c..4160831d2 (1 commit).

https://chromium.googlesource.com/external/github.com/catapult-project/catapult.git/+log/6cad5da3c39e..4160831d2082

$ git log 6cad5da3c..4160831d2 --date=short --no-merges --format='%ad %ae %s'

TBR=catapult-sheriff@chromium.org

Review-Url: https://codereview.chromium.org/2135893002
Cr-Commit-Position: refs/heads/master@{#404610}

DEPS

@@ -88,7 +88,7 @@ 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': '6cad5da3c39eca66c6dcd2db0b4cb1885fc00556',
+  'catapult_revision': '4160831d2082e3e07cc9b2a957dca49391ba7edf',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libFuzzer
   # and whatever else without interference from each other.