virNodeGetCPUMap introduced in libvirt 1.0. In some linux distributions
like Ubuntu12/14 and Fedora18, libvirt version is older than 1.0. So this
sample will not build pass.
Replace "virNodeGetCPUMap" with another libvirt API "virNodeGetInfo".
Signed-off-by: Marvin Liu <yong.liu@intel.com>