src: Add QEMU makefile

src: Add QEMU makefile

QEMU v2.2.0+ is recommended for vhost-user. We are adding QEMU 2.2.1
to the makefile because the EPEL repo for CentOS7 only supports QEMU 2.0.0.

JIRA: VSPERF-56

Change-Id: I1c65ad6030888802586659d044f069f7fe57c0ea
Signed-off-by: Timo Puha <timox.puha@intel.com>
Signed-off-by: Madarang, Dino Simeon <dino.simeonx.madarang@intel.com>
Reviewed-by: Billy O Mahony <billy.o.mahony@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Eugene Snider <Eugene.Snider@huawei.com>
Reviewed-by: Gurpreet Singh <gurpreet.singh@spirent.com>
Reviewed-by: Tv Rao <tv.rao@freescale.com>