-replace_malloc: support operators that aren't paired with malloc,free in same modules

_From [bruen...@google.com](https://code.google.com/u/109494838902877177630/) on August 08, 2012 20:59:13_

xref issue #964 , issue #939 we can hardcode msvcp and assume it calls into msvcr\* (and that libstdc++ uses libc) but what about general issue?
we'd have to analyze the operator routines and see which malloc/free they call

_Original issue: http://code.google.com/p/drmemory/issues/detail?id=967_