GitLab

While attempting to s/SK_BUILD_FOR_WIN32/SK_BUILD_FOR_WIN/g,
I stumbled upon this define for bzero.  Skia doesn't use bzero,
and there's no good reason for skia/ext to use it either.

Change-Id: I12cbc5d40c17491fe1d648540655fad156196549
Reviewed-on: https://chromium-review.googlesource.com/884007Reviewed-by: Mike Reed <reed@chromium.org>
Commit-Queue: Mike Klein <mtklein@chromium.org>
Cr-Commit-Position: refs/heads/master@{#531916}