app-emulation/qemu: Move package to chromiumos_overlay

We need to carry a local patch for a networking stability bug until
there is a new upstream release with the fix.

BUG=chromium:766323
TEST=`sudo emerge qemu`
CQ-DEPEND=CL:676481

Change-Id: I20ff5cfe7f0b9ea611bee0700f69ad15b3f2733c
Reviewed-on: https://chromium-review.googlesource.com/676530
Commit-Ready: Kevin Cernekee <cernekee@chromium.org>
Tested-by: Kevin Cernekee <cernekee@chromium.org>
Reviewed-by: Ilja H. Friedel <ihf@chromium.org>
Reviewed-by: Bernie Thompson <bhthompson@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
9 files changed