[community-mysql/f19] (6 commits) ...Fix building with relro and PIE

[Honza Horak]

Summary of changes:

  e80059e... fix paths in -plugin-test patch (*)
  eab6baa... Build with _hardened_build (*)
  1a2ec63... Fix some paths related to test suite (*)
  04d6ad3... Add BR for perl(Env) needed by test rpl_manual_change_index (*)
  bd951ae... Fix paths in -plugin-test patch (*)
  654bf00... Fix building with relro and PIE (*)

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