[gdb] (2 commits) ...Fix performance regressions with .gdb_index (Tom Tromey, BZ 805274).

[Jan Kratochvil]

Summary of changes:

  5727027... Fixup %{_datadir}/gdb timestamps for multilib conflicts on  (*)
  ea0fcb4... Fix performance regressions with .gdb_index (Tom Tromey, BZ (*)

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