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/system/s6/default.nix

@@ -0,0 +1,43 @@
+{ skawarePackages }:
+
+with skawarePackages;
+
+buildPackage {
+  pname = "s6";
+  version = "2.11.1.0";
+  sha256 = "sha256-rmTcK6II/4DkrEeSzpDdUmtCvxnJZtx9jrmmhw5Lwjo=";
+
+  description = "skarnet.org's small & secure supervision software suite";
+
+  # NOTE lib: cannot split lib from bin at the moment,
+  # since some parts of lib depend on executables in bin.
+  # (the `*_startf` functions in `libs6`)
+  outputs = [ /*"bin" "lib"*/ "out" "dev" "doc" ];
+
+  # TODO: nsss support
+  configureFlags = [
+    "--libdir=\${out}/lib"
+    "--libexecdir=\${out}/libexec"
+    "--dynlibdir=\${out}/lib"
+    "--bindir=\${out}/bin"
+    "--includedir=\${dev}/include"
+    "--with-sysdeps=${skalibs.lib}/lib/skalibs/sysdeps"
+    "--with-include=${skalibs.dev}/include"
+    "--with-include=${execline.dev}/include"
+    "--with-lib=${skalibs.lib}/lib"
+    "--with-lib=${execline.lib}/lib"
+    "--with-dynlib=${skalibs.lib}/lib"
+    "--with-dynlib=${execline.lib}/lib"
+  ];
+
+  postInstall = ''
+    # remove all s6 executables from build directory
+    rm $(find -type f -mindepth 1 -maxdepth 1 -executable)
+    rm libs6.*
+    rm ./libs6lockd.a.xyzzy
+
+    mv doc $doc/share/doc/s6/html
+    mv examples $doc/share/doc/s6/examples
+  '';
+
+}