Merge third_party/skia/gyp from https://chromium.googlesource.com/external/skia/gyp.git at c569d5b19cfd8d54a5e65e68792db971a6315ba7

This commit was generated by merge_from_chromium.py.

Change-Id: Ic23b428036dc73a5987fe32c0a0ace4d14e7a1e8