guard legacy bilerp-ignorning hack

Bug: skia:6835
Change-Id: I7f3136595299f9193bc9173a03b782888043aeb5
Reviewed-on: https://skia-review.googlesource.com/21722
Reviewed-by: Florin Malita <fmalita@chromium.org>
Commit-Queue: Mike Reed <reed@google.com>
1 file changed