Update sys-queue.h (Gerd Hoffmann)

 - got recent copy from netbsd.
 - deleted debug code.
 - deleted some list implementations, left in only the ones which
   qemu already has.
Signed-off-by: NGerd Hoffmann <kraxel@redhat.com>
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4973 c046a42c-6fe2-441c-8c8c-71466251a162