[LITMUS^RT] Final EDF Tie Break Patch & GCC 4.6 LibLitmus Fix

[Glenn Elliott]

> * I've incorporated Björn's comments into 'prop/robust-tie-break' and I have pushed the final patch to github.

I found a bug that I introduced in the rewrite.  I was doing "!second_task-rt_param.inh_task" when I should have been doing "!second->rt_param.inh_task".  That is, I got the tie-break case when PIDs are equal wrong.  I pushed a fix.

-Glenn