[k3b/f18] (2 commits) ...use /var/tmp instead of /tmp

[Rex Dieter]

Summary of changes:

  38c12a9... Use -fno-strict-aliasing (k3b does some nasty stuff with po (*)
  3c2e493... use /var/tmp instead of /tmp (*)

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