[gdb] (3 commits) ...Workaround crashes from stale frame_info pointer (BZ 804256).

[Jan Kratochvil]

Summary of changes:

  e26cb4d... [RHEL5,RHEL6] Reintroduce fix attaching to stopped processe (*)
  78a785d... testsuite: Fix break-interp.exp expections for updated glib (*)
  fbf39fd... Workaround crashes from stale frame_info pointer (BZ 804256 (*)

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