Add SK_LEGACY_SWEEP_GRADIENT on Android

Speculative roll fix.

Change-Id: I570c807c4f1d695fe46526a943d5376b79b358a1
Reviewed-on: https://skia-review.googlesource.com/17023
Reviewed-by: Mike Klein <mtklein@chromium.org>
Commit-Queue: Florin Malita <fmalita@chromium.org>
1 file changed