linux-vgt.patch: remove ubuntu specific patch to Makefile
linux-vgt: ignore ASSERT_VM assertions as they seem to be unstoppable, yet not truly fatal...
udev vgt.rules: update to SNAPSHOT 9.26
xengt-dom0: do not set default to boot hvm to foreground
xen: update qemu QIPS patch to e2e720fd3a02c084c3d2770d5c4ad561c676c616