[ardour/f16] (4 commits) ...New upstream release 2.8.13.

[Orcan Ogetbil]

Summary of changes:

  315210c... rebuild for gcc 4.7 (*)
  fe308b9... - Rebuilt for c++ ABI breakage (*)
  44ab389... gcc-4.7 FTBFS fix RHBZ#818364 (*)
  a16647c... New upstream release 2.8.13. (*)

(*) This commit already existed in another branch; no separate mail sent