fix g3 by adding legacy flag

Bug: skia:7554
Change-Id: I0aa766f58719b29340e5b225c74781b9884f30f6
Reviewed-on: https://skia-review.googlesource.com/150242
Auto-Submit: Mike Reed <reed@google.com>
Reviewed-by: Mike Reed <reed@google.com>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed