[firefox/f19] (3 commits) ...Fixed rhbz#1161110 - /usr/bin/firefox should not mess with TMPDIR

[Martin Stransky]

Summary of changes:

  3d545d8... Added yasm to build req, needed for in-tree turbo jpeg (*)
  e0dccae... system jpeg - let's do it better (*)
  f8f8f90... Fixed rhbz#1161110 - /usr/bin/firefox should not mess with  (*)

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