Code Review: perffix

tfpt review “/shelveset:perffix;REDMOND\jdeville”
Comment :
The killing of erroneous processes now happens in the bench.rake file.
We kill all ir, java, and ruby processes that aren’t the rake runner
before each new bench file is started. This should keep numbers
accurate, and allow for completely automated local perf runs. This still
needs to be cleaned up before it can be submitted to the RBS project.

FYI, checking this in.