Roll external/skia 98ad5b7a4..e027e1947 (5 commits)

https://skia.googlesource.com/skia.git/+log/98ad5b7a4..e027e1947

2018-03-13 benjaminwagner@google.com Temporarily remove Win10 QuadroP400 from CQ.
2018-03-13 caryclark@skia.org consolidate SaveLayerFlag internal references
2018-03-13 rmistry@google.com Increase Android framework bot deadline since we are now building more
2018-03-13 bungeman@google.com Include correct trace.h.
2018-03-13 bsalomon@google.com Fix possible overflows in hair line path renderer vertex counts

The AutoRoll server is located here: https://android-roll.skia.org

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: I2f6361f515b358390259778ae5e10144b9994c31
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.