i#4153: Fix bogus addresses returned by drsyms (#4164)
i#4153: Fix bogus addresses returned by drsyms (#4164)

Adds checking that SymFromName's return value is within the
being-queried module bounds.

Tested on the drcachesim fib test.

Fixes #4153
AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio,AmesianX/dynamorio