add != for SkFont

Bug: skia:
Change-Id: I8d585082ee8ded3c6b690a8a6d238cd58c520a1c
Reviewed-on: https://skia-review.googlesource.com/c/174100
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed