Further fixes to try to get a Koji build.
    
    Add a hack to use siginfo_t instead of siginfo with glibc from
    Rawhide.  This patch is highly UNlikely to be correct.  It only
    affects linux-user which approximately no one cares about.
    
    Disable 'make check' since it hangs intermittently.
    
    Add kvmvapic.bin (replaces vapic.bin).
    
    Add cpus-x86_64.conf.  qemu now creates /etc/qemu/target-x86_64.conf
    as an empty file.
    
    Add qemu-icon.bmp.
    
    Add qemu-bridge-helper.