treewide: Fix some references to binutils

- Compiler's shouldn't use `binutils.dev` as that doesn't yet exist
   with a cross binutils.

 - Last two `binutils.binutils` which weren't reverted

pkgs/development/compilers/mono/llvm.nix

@@ -42,7 +42,7 @@ stdenv.mkDerivation rec {
 
   cmakeFlags = with stdenv; [
     "-DLLVM_ENABLE_FFI=ON"
-    "-DLLVM_BINUTILS_INCDIR=${binutils.dev}/include"
+    "-DLLVM_BINUTILS_INCDIR=${stdenv.lib.getDev binutils}/include"
     "-DCMAKE_CXX_FLAGS=-std=c++11"
   ] ++ stdenv.lib.optional (!isDarwin) "-DBUILD_SHARED_LIBS=ON";