fixed issue 851 - forward align the brk addr to page size
fixed issue 851
- forward align the brk addr to page size

SVN-Revision: 1482

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