RTEMS_FATAL_SOURCE_EXCEPTION on booting PRU for beagleboneblack

[Sebastian Huber]

Hello,

one idea to debug problems like this is to

* compile libbsd with --finstrument-functions,

* enable the event recording,

* dump the event records in base64 encoding in the fatal error handler,

* add support for base64 encoded data to the rtems-record-lttng 
converter, and

* view the trace with babeltrace or Trace Compass.