Revert "Suppress system leak in find_last_not_of found in cs2bug on Cygwin."
Revert "Suppress system leak in find_last_not_of found in cs2bug on Cygwin."

TBR=bruening

This was just Cygwin's addr2line getting the symbols in the stack trace
wrong.  found_last_not_of is never called during cs2bug when run
natively, and the only 1 byte allocation that ever happens is the
std::numpunct::_Init leak that we already suppress.

SVN-Revision: 585

LohithBlaze/drmemory,code4bones/drmemory,sigma-random/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,code4bones/drmemory,code4bones/drmemory,sigma-random/drmemory,code4bones/drmemory,sigma-random/drmemory,code4bones/drmemory,LohithBlaze/drmemory,sigma-random/drmemory,LohithBlaze/drmemory,LohithBlaze/drmemory