[ecl/f18] (3 commits) ...BR libatomic_ops-static instead of -devel (bz 889173). Pull in upstream patches for bugs discovered

[Jerry James]

Summary of changes:

  5d073eb... track libecl soname, so bumps aren't a surprise (*)
  72bc747... the soname handling here is uncommon (*)
  58995c0... BR libatomic_ops-static instead of -devel (bz 889173). Pull (*)

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