Roll external/skia 58627cb8e..b0601a409 (7 commits)

https://skia.googlesource.com/skia.git/+log/58627cb8e..b0601a409

2018-04-10 csmartdalton@google.com ccpr: Improve CPU checks for collinear points
2018-04-10 csmartdalton@google.com ccpr: Remove fCurrAnchorPoint from GrCCGeometry
2018-04-10 mtklein@chromium.org give skcms rolls a helpful commit msg
2018-04-10 update-skps@skia.org Update SKP version
2018-04-10 robertphillips@google.com Remove extra Vulkan submitCommandBuffer from deleteTestingOnlyBackendTexture
2018-04-10 mtklein@chromium.org hard-roll skcms into Skia
2018-04-10 egdaniel@google.com Update getBackendInfo calls on GrBackendTexture to support VkImageLayout better.

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: Iaa362e52b6515f31345f92e8f49d69862e8c78c7
Exempt-From-Owner-Approval: The autoroll bot does not require owner approval.