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/networking/s6-dns/default.nix

@@ -0,0 +1,36 @@
+{ skawarePackages }:
+
+with skawarePackages;
+
+buildPackage {
+  pname = "s6-dns";
+  version = "2.3.5.3";
+  sha256 = "1nknkh2rw7ggf5ncspb11wyp6ldyqc9lf3nmnklwb5fcf5kjzi1a";
+
+  description = "A suite of DNS client programs and libraries for Unix systems";
+
+  outputs = [ "bin" "lib" "dev" "doc" "out" ];
+
+  configureFlags = [
+    "--libdir=\${lib}/lib"
+    "--libexecdir=\${lib}/libexec"
+    "--dynlibdir=\${lib}/lib"
+    "--bindir=\${bin}/bin"
+    "--includedir=\${dev}/include"
+    "--with-sysdeps=${skalibs.lib}/lib/skalibs/sysdeps"
+    "--with-include=${skalibs.dev}/include"
+    "--with-lib=${skalibs.lib}/lib"
+    "--with-dynlib=${skalibs.lib}/lib"
+  ];
+
+  postInstall = ''
+    # remove all s6-dns executables from build directory
+    rm $(find -type f -mindepth 1 -maxdepth 1 -executable)
+    rm libs6dns.*
+    rm libskadns.*
+    rm libdcache.*
+
+    mv doc $doc/share/doc/s6-dns/html
+  '';
+
+}