[DynInst_API:] [dyninst/dyninst] 7f1e24: Make Symtab::parseTypesNow thread-safe (#1497)

[Tim Haines <noreply@xxxxxxxxxx>]

  Branch: refs/heads/master
  Home:   https://github.com/dyninst/dyninst
  Commit: 7f1e24d526be740d9c200c5a2b26b0033709806d
      https://github.com/dyninst/dyninst/commit/7f1e24d526be740d9c200c5a2b26b0033709806d
  Author: Tim Haines <thaines.astro@xxxxxxxxx>
  Date:   2023-08-28 (Mon, 28 Aug 2023)

  Changed paths:
    M symtabAPI/h/Symtab.h
    M symtabAPI/src/Symtab.C

  Log Message:
  -----------
  Make Symtab::parseTypesNow thread-safe (#1497)

There are many places where this is called without a user realizing it.
If they were to call any of those functions in parallel, type parsing
would break.