[DynInst_API:] [dyninst/dyninst] d1b1e0: reorganize and cleanup Symtab.h (#1557)

[kupsch <noreply@xxxxxxxxxx>]

  Branch: refs/heads/master
  Home:   https://github.com/dyninst/dyninst
  Commit: d1b1e0e2306bb1877ca9cc76320406bd544a2a63
      https://github.com/dyninst/dyninst/commit/d1b1e0e2306bb1877ca9cc76320406bd544a2a63
  Author: kupsch <kupsch@xxxxxxxxxxx>
  Date:   2023-10-03 (Tue, 03 Oct 2023)

  Changed paths:
    M symtabAPI/CMakeLists.txt
    A symtabAPI/h/ExceptionBlock.h
    M symtabAPI/h/Symtab.h
    A symtabAPI/h/relocationEntry.h
    A symtabAPI/src/ExceptionBlock.C
    M symtabAPI/src/Symbol.C
    M symtabAPI/src/Symtab.C
    A symtabAPI/src/relocationEntry.C

  Log Message:
  -----------
  reorganize and cleanup Symtab.h (#1557)

- fix incomplete type error of a std::vector<relocationEntry>
  member declared before relocationEntry was defined

- move class ExceptionBlock to its own .h and .C

- move class relocationEntry to its own .h and .C

- move Symbol:: methods from Symtab.C to Symbol.C