[PATCH v4 0/5 qemu] GNU/Hurd support

[Damien Zammit]

Hi all,

Thank you for quick review.  I have addressed the comments and am
sending you v4 in this thread.

TESTED: Compiles and runs qemu-system-{i386,x86_64} on GNU/Hurd x86_64
(TPM compiled in)

Thanks,
Damien