Roll external/skia c244c2fbb..60c0c8fcd (5 commits)

https://skia.googlesource.com/skia.git/+log/c244c2fbb..60c0c8fcd

2018-11-09 mtklein@google.com remove unused typedef
2018-11-09 halcanary@google.com SkQP: script: fix non-existant build path
2018-11-09 reed@google.com remove guards for hinting in google3
2018-11-09 nathanrogers@google.com Fix another typo in SkSize comments
2018-11-09 nigeltao@google.com Merge SkFooAdapterCodec impls into one impl

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
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Test: Presubmit checks will test this change.
Change-Id: If0bafd657dcdb57c787368f70e282dc2ca922577
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.