llvmPackages: maintenance update to 3.4.2

Updated all that was released: llvm, clang, and libc++.

pkgs/development/compilers/llvm/3.4/clang.nix

@@ -4,7 +4,7 @@ stdenv.mkDerivation {
   name = "clang-${version}";
 
   unpackPhase = ''
-    unpackFile ${fetch "cfe" "1dvbkld0a1aqj6wcn0ia1wa8lwha30yfgq16j1r7akdka44z70xb"}
+    unpackFile ${fetch "cfe" "045wjnp5j8xd2zjhvldcllnwlnrwz3dafmlk412z804d5xvzb9jv"}
     mv cfe-${version}.src clang
     sourceRoot=$PWD/clang
     unpackFile ${clang-tools-extra_src}

pkgs/development/compilers/llvm/3.4/default.nix

@@ -15,13 +15,13 @@ let
 
   self = {
     llvm = callPackage ./llvm.nix rec {
-      version = "3.4.1";
+      version = "3.4.2";
       fetch = fetch_v version;
       inherit compiler-rt_src;
     };
 
     clang = callPackage ./clang.nix rec {
-      version = "3.4.1";
+      version = "3.4.2";
       fetch = fetch_v version;
       inherit clang-tools-extra_src;
     };

pkgs/development/compilers/llvm/3.4/llvm.nix

@@ -15,7 +15,7 @@
 }:
 
 let
-  src = fetch "llvm" "0fprxrilnlwk9qv7f0kplxc7kd8mp4x781asssv2nfi4r9pbna3x";
+  src = fetch "llvm" "1mzgy7r0dma0npi1qrbr1s5n4nbj1ipxgbiw0q671l4s0r3qs0qp";
 in stdenv.mkDerivation rec {
   name = "llvm-${version}";