Merge branch 'master', remote-tracking branch 'upstream/master'
[x86] Prompt is up on Intel 64

With this patch, the Xvisor comes to prompt on Intel 64
x86_64 generic machine. Tested on Qemu and Regular machine.

Signed-off-by: Himanshu Chauhan <hschauhan@nulltrace.org>
Merge pull request #13 from hschauhan/x86-next

X86 next