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/hss/default.nix

@@ -0,0 +1,34 @@
+{ lib, buildRubyGem, ruby, openssh }:
+
+# Example ~/.hss.yml
+#---
+#patterns:
+#  - note: Basic test
+#    example: g -> github
+#    short: '^g$'
+#    long: 'git@github.com'
+
+buildRubyGem rec {
+  name = "hss-${version}";
+  inherit ruby;
+  gemName = "hss";
+  version = "1.0.1";
+  source.sha256 = "0hdfpxxqsh6gisn8mm0knsl1aig9fir0h2x9sirk3gr36qbz5xa4";
+
+  postInstall = ''
+   substituteInPlace $GEM_HOME/gems/${gemName}-${version}/bin/hss \
+     --replace \
+       "'ssh'" \
+       "'${openssh}/bin/ssh'"
+  '';
+
+  meta = with lib; {
+    description = ''
+      A SSH helper that uses regex and fancy expansion to dynamically manage SSH shortcuts.
+    '';
+    homepage    = "https://github.com/akerl/hss";
+    license     = licenses.mit;
+    maintainers = with maintainers; [ nixy ];
+    platforms   = platforms.unix;
+  };
+}