qemumachines: make MACHINE_FEATURES append follow qemu.inc include
qemu.inc does a straight assign to MACHINE_FEATURES so overwriting the
preceding append to MACHINE_FEATURES, so the MACHINE_FEATURES append
needs to be moved after the include.
This situation came about as a result of commit
71a4bf386:
qemumachines: Enable xserver-xorg as default xserver
For qemux86 and qemux86-64 include qemu.inc after defining XSERVER
which missed this side-effect (and maybe others).
Signed-off-by: Tom Zanussi <tom.zanussi@intel.com>
