Roll external/skia c4616804b..df430053e (6 commits)

https://skia.googlesource.com/skia.git/+log/c4616804b..df430053e

2018-02-09 benjaminwagner@google.com Add MacBook10,1 jobs.
2018-02-09 brianosman@google.com Create sksl_enums.inc with UNIX line endings (even on Windows)
2018-02-09 brianosman@google.com Remove (unused) NV_bindless_texture from GL interface
2018-02-09 brianosman@google.com Add missing include (to get std::min on MSVC)
2018-02-09 kjlubick@google.com Break some fuzzer targets out so oss-fuzz can use them
2018-02-09 bsalomon@google.com Revert "Revert "Remove SkImage deferred texture image data APIs.""

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: I31987ea77c75a1095b8610beca8e4f35399c4fb5
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.