Roll external/skia feae867f8..ac55784e3 (1 commits)

https://skia.googlesource.com/skia.git/+log/feae867f8..ac55784e3

2019-05-04 halcanary@google.com Tests: re-sort gni, file name convention

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Change-Id: I5607d360defbaa05dc0482efa4b07a647d7fb4f0
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