opal-ci: Build qemu from Cedric's powernv-2.12 branch
This contains the latest features. It's close to upstream, but there's
enough stuff in there that it probably makes sense to continue using it
for now.
set -e
set -vx
-git clone --depth=1 -b qemu-powernv-for-skiboot-3 git://github.com/open-power/qemu.git
+git clone --depth=1 -b powernv-2.12 git://github.com/legoater/qemu.git
cd qemu
git submodule update --init dtc
export CC="ccache gcc"
