uboot: (firmwareOdroidC2/C4) don't invoke patch tool, use patches = [] instead

https://github.com/NixOS/nixpkgs/blob/master/pkgs/stdenv/generic/setup.sh#L948
this can do it nicely.

Signed-off-by: Anton Arapov <anton@deadbeef.mx>

pkgs/development/compilers/chicken/4/overrides.nix

@@ -0,0 +1,10 @@
+{
+  setup-helper = {
+    preBuild = ''
+      substituteInPlace setup-helper.setup \
+        --replace "(chicken-home)" \"$out/share/\"
+
+        cat setup-helper.setup
+    '';
+  };
+}