KVM: Export <linux/kvm.h>

This allows users to actually build prgrams that use kvm without
the entire source tree.
Signed-off-by: Avi Kivity <avi@qumranet.com>

include/linux/Kbuild

@@ -96,6 +96,7 @@ header-y += iso_fs.h
 header-y += ixjuser.h
 header-y += jffs2.h
 header-y += keyctl.h
+header-y += kvm.h
 header-y += limits.h
 header-y += lock_dlm_plock.h
 header-y += magic.h