Roll external/skia 3ed198faf..ec7278e70 (2 commits)

https://skia.googlesource.com/skia.git/+log/3ed198faf..ec7278e70

2019-02-01 reed@google.com remove unneeded friends/includes in SkPaint.h
2019-02-01 kjlubick@google.com CMake: distinguish between file and dir copies by presence of '.' in src path

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Change-Id: I4ed1061bc14f51447424c7559c486aa7d30c25a9
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