Disable the chisel-torture test sets

There have been some incompatible changes to the upstream
chisel-benchmarks package which need to be dealt with in here.  Until
that happens I'm disabling all of those tests.
Update the Ubuntu release number

So apparently Ubuntu bumped their release number to 12.04.5.  I guess
I should really have a regex for this, but instead I just went ahead
and hard-coded the new value in -- I guess because everything is
packaged it should be fine?