declare SkFont SK_API

Bug: skia:
Change-Id: I83c5d6aabcb56338b76a5a4e6bba8685e90a83b4
Reviewed-on: https://skia-review.googlesource.com/c/166202
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed