[armadillo/f19] (3 commits) ...update to 4.550.2

[rcurtin]

Summary of changes:

  3e9825f... Update to 4.550.2 for gcc 4.4 bug. (*)
  9c05581... Update to 4.550.2 for gcc 4.4 bug, which is relevant on EL6 (*)
  2b8ec9a... update to 4.550.2 (*)

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