Test threaded log module for rtems-tools

[chrisj at rtems.org]

Hello,

This is a test patch of a threading logger. My testing with qemu
on a multi-core box gave me an average time of 800msec with
a number of timeouts for the xilinx_zynq_a9_qemu BSP.

I will try this code in the RSB to see if it works there.

Anders, have a look as a possible start of a solution.

Thanks
Chris