automation: Add qemu to debian:stretch container for smoke test

We can add qemu into the container so that there's no need to install
it everytime we run a test.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Reviewed-by: Andrew Cooper <andrew.cooper3@citrix.com>

automation/scripts/qemu-smoke-x86-64.sh

@@ -5,11 +5,6 @@ set -ex
 # variant should be either pv or pvh
 variant=$1
 
-# Install QEMU
-export DEBIAN_FRONTENT=noninteractive
-apt-get -qy update
-apt-get -qy install qemu-system-x86
-
 # Clone and build XTF
 git clone https://xenbits.xen.org/git-http/xtf.git
 cd xtf && make -j$(nproc) && cd -