[Libvir] 14/22 No uname function

Windows doesn't have uname or <sys/utsname.h>. We can't get the model info without more delving into the Win32 API. This just disables the functionality temporarily, but a proper fix will be to find out how to do this under Windows. Rich. -- Emerging Technologies, Red Hat - http://et.redhat.com/~rjones/ Registered Address: Red Hat UK Ltd, Amberley Place, 107-111 Peascod Street, Windsor, Berkshire, SL4 1TE, United Kingdom. Registered in England and Wales under Company Registration No. 03798903