Update autotools-multilib.eclass to r1.20

A new version of this eclass is necessary because the old
version does not support EAPI=5 and freetype 2.5.0.x depends
on this eclass.

BUG=chromium:324184
TEST=`cbuildbot chromiumos-sdk` still works

Change-Id: Ifd77398356f9926d1dfb7c84743e601bf8e6a567
Reviewed-on: https://chromium-review.googlesource.com/188218
Reviewed-by: Mike Frysinger <vapier@chromium.org>
Tested-by: Jungshik Shin <jshin@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
1 file changed