add support to runstats for printing to a file instead of stderr
add support to runstats for printing to a file instead of stderr

SVN-Revision: 537

AmesianX/dynamorio,bl4ckic3/dynamorio,bl4ckic3/dynamorio,sigma-random/dynamorio,bl4ckic3/dynamorio,code4bones/dynamorio,sigma-random/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,code4bones/dynamorio,sigma-random/dynamorio,daksunt/dynamorio,code4bones/dynamorio,code4bones/dynamorio,AmesianX/dynamorio,code4bones/dynamorio,daksunt/dynamorio,daksunt/dynamorio,daksunt/dynamorio,AmesianX/dynamorio,daksunt/dynamorio,sigma-random/dynamorio,bl4ckic3/dynamorio,sigma-random/dynamorio,bl4ckic3/dynamorio