treewide: Depend on targetPackages.stdenv.cc.bintools instead of binutils directly

One should do this when needed executables at run time. It is more
honest and cross-friendly than refering to binutils directly, if one
neeeds the default binary tools for the target platform, rather than
binutils in particular.

pkgs/development/compilers/gcc/4.8/default.nix

@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, fetchpatch, noSysDirs
+{ stdenv, targetPackages, fetchurl, fetchpatch, noSysDirs
 , langC ? true, langCC ? true, langFortran ? false
 , langObjC ? targetPlatform.isDarwin
 , langObjCpp ? targetPlatform.isDarwin
@@ -149,8 +149,8 @@ let version = "4.8.5";
         withFloat +
         withMode +
         # Ensure that -print-prog-name is able to find the correct programs.
-        " --with-as=${binutils}/bin/${targetPlatform.config}-as" +
-        " --with-ld=${binutils}/bin/${targetPlatform.config}-ld" +
+        " --with-as=${targetPackages.stdenv.cc.bintools}/bin/${targetPlatform.config}-as" +
+        " --with-ld=${targetPackages.stdenv.cc.bintools}/bin/${targetPlatform.config}-ld" +
         (if crossMingw && crossStageStatic then
           " --with-headers=${libcCross}/include" +
           " --with-gcc" +
@@ -299,7 +299,7 @@ stdenv.mkDerivation ({
     ++ (optional (zlib != null) zlib)
     ++ (optionals langJava [ boehmgc zip unzip ])
     ++ (optionals javaAwtGtk ([ gtk2 libart_lgpl ] ++ xlibs))
-    ++ (optionals (targetPlatform != hostPlatform) [binutils])
+    ++ (optionals (targetPlatform != hostPlatform) [targetPackages.stdenv.cc.bintools])
     ++ (optionals langAda [gnatboot])
     ++ (optionals langVhdl [gnat])