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/ssh-ident/default.nix

@@ -0,0 +1,31 @@
+{ stdenvNoCC, lib, fetchFromGitHub, python3, openssh}:
+
+stdenvNoCC.mkDerivation {
+  pname = "ssh-ident";
+  version = "2016-04-21";
+  src = fetchFromGitHub  {
+    owner = "ccontavalli";
+    repo = "ssh-ident";
+    rev = "ebf8282728211dc4448d50f7e16e546ed03c22d2";
+    sha256 = "1jf19lz1gwn7cyp57j8d4zs5bq13iw3kw31m8nvr8h6sib2pf815";
+  };
+
+  postPatch = ''
+    substituteInPlace ssh-ident \
+      --replace 'ssh-agent >' '${openssh}/bin/ssh-agent >'
+  '';
+  buildInputs = [ python3 ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    install -m 755 ssh-ident $out/bin/ssh-ident
+  '';
+
+  meta = with lib; {
+    homepage = "https://github.com/ccontavalli/ssh-ident";
+    description = "Start and use ssh-agent and load identities as necessary";
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ telotortium ];
+    platforms = with platforms; unix;
+  };
+}