[cross-gcc/f20] (3 commits) ...Need cross-binutils-2.24-5 for NIOS2

[David Howells]

Summary of changes:

  aadca19... Enable libgcc building on cris [gcc BZ 61737]. (*)
  af0f349... Add NIOS2 arch support. (*)
  3478c6a... Need cross-binutils-2.24-5 for NIOS2 (*)

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