[DynInst_API:] [dyninst/dyninst] 64b85e: change P_cplus_demangle interface

[kupsch <noreply@xxxxxxxxxx>]

  Branch: refs/heads/demangle
  Home:   https://github.com/dyninst/dyninst
  Commit: 64b85e6a9d483cbf3577b46afffabf2ea763e0de
      https://github.com/dyninst/dyninst/commit/64b85e6a9d483cbf3577b46afffabf2ea763e0de
  Author: James A. Kupsch <kupsch@xxxxxxxxxxx>
  Date:   2020-10-14 (Wed, 14 Oct 2020)

  Changed paths:
    M common/src/freebsdHeaders.h
    M common/src/freebsdKludges.C
    M common/src/linuxHeaders.h
    M common/src/linuxKludges.C
    M common/src/ntHeaders.h
    M common/src/symbolDemangleWithCache.C
    M common/src/symbolDemangleWithCache.h
    M symlite/src/SymLite-elf.C
    M symtabAPI/src/Symbol.C
    M symtabAPI/src/dwarfWalker.C
    M symtabAPI/src/parseStab.C

  Log Message:
  -----------
  change P_cplus_demangle interface

* now takes and returns a std::string instead of a char*