Add support for Windows to the gradle builds

Bug: skia:
Change-Id: Ie463354281f5091866c6ccda3d041f6c7d8f0558
Reviewed-on: https://skia-review.googlesource.com/c/182101
Reviewed-by: Derek Sollenberger <djsollen@google.com>
Reviewed-by: Stan Iliev <stani@google.com>
Commit-Queue: Chris Dalton <csmartdalton@google.com>
1 file changed