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/tools/text/gawk/gawk-with-extensions.nix

@@ -0,0 +1,13 @@
+{ runCommand, gawk, extensions, makeWrapper }:
+
+runCommand "gawk-with-extensions" {
+  nativeBuildInputs = [ makeWrapper ];
+  buildInputs = [ gawk ] ++ extensions;
+} ''
+  mkdir -p $out/bin
+  for i in ${gawk}/bin/*; do
+    name="$(basename "$i")"
+    makeWrapper $i $out/bin/$name \
+      --prefix AWKLIBPATH : "${gawk}/lib/gawk:''${AWKLIBPATH:-}"
+  done
+''