Include CentOS 6.5/RHEL 6.5-friendly Qemu paths.

    $ rpm -ql qemu-kvm | egrep /qemu-kvm$
    /usr/libexec/qemu-kvm
    /usr/share/qemu-kvm

(The latter is a directory.)
Merge pull request #50 from ojacobson/centos-qemu-paths

Include CentOS 6.5/RHEL 6.5-friendly Qemu paths.