[icecat/f21] (6 commits) ...Removed -fexceptions flags from Fedora optflags.

[Antonio Trande]

Summary of changes:

  f6527ea...  Update to 31.2.0 (*)
  722d322... Fixed compiler flags. (*)
  4720667... Fixed compiler flags. (*)
  9502b34... Added -Wformat-security flags. (*)
  0ede272... Added -Wformat-security flags. (*)
  bf04d8d... Removed -fexceptions flags from Fedora optflags. (*)

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