Roll external/skia 5ba2a8a5b..068f3418a (1 commits)

https://skia.googlesource.com/skia.git/+log/5ba2a8a5b..068f3418a

2019-02-18 recipe-roller@chromium.org Roll recipe dependencies (trivial).

The AutoRoll server is located here: https://autoroll-internal.skia.org/r/android-master-autoroll

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+/master/autoroll/README.md

If the roll is causing failures, please contact the current sheriff, who should
be CC'd on the roll, and stop the roller if necessary.

Test: Presubmit checks will test this change.
Change-Id: I3f7db4f7138662f772ff36f75fadec72256be597
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.