[PATCH] Fio's initial RTEMS port

[dev.madaari at gmail.com]

Following IOengines are currently working on RTEMS:
 - psync, sync, vsync, filecreate, ftruncate, null

I've attached the patch in my following mail, please have a look.

Here's the corresponding ticket:https://devel.rtems.org/ticket/3429
Please note that i have also sent the patch to fio at vger.kernel.org, for their
review of mostly fio-specific part.