libffi: upgraded package to upstream

Upgraded {dev-libs,virtual}/libffi to version 3.0.11 on amd64, arm, x86

BUG=chromium:219083
TEST=`cbuildbot chromiumos-sdk {x86-alex,stumpy}-release` works

Change-Id: Ie1b27933fa25ae44bb4beacde97245c57be9cd3d
Reviewed-on: https://chromium-review.googlesource.com/176129
Reviewed-by: Aviv Keshet <akeshet@chromium.org>
Tested-by: Mike Frysinger <vapier@chromium.org>
Commit-Queue: Mike Frysinger <vapier@chromium.org>
9 files changed