[DynInst_API:] [dyninst/dyninst] 946208: Add cmake options for C/C++ language standards

[kupsch <noreply@xxxxxxxxxx>]

  Branch: refs/heads/kupsch/add-language-standard-options
  Home:   https://github.com/dyninst/dyninst
  Commit: 9462089ec393b14bf6c8b51cc7f49521ef3e23d5
      https://github.com/dyninst/dyninst/commit/9462089ec393b14bf6c8b51cc7f49521ef3e23d5
  Author: James A. Kupsch <kupsch@xxxxxxxxxxx>
  Date:   2022-04-04 (Mon, 04 Apr 2022)

  Changed paths:
    M cmake/LanguageStandards.cmake

  Log Message:
  -----------
  Add cmake options for C/C++ language standards

Add cmake options to set C/C++ language standard versions used to build to
facilitate testing.

- C_LANGUAGE_STANDARD cmake option:  C Standard version
- CXX_LANGUAGE_STANDARD cmake option:  C++ Standard version