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/misc/sl/default.nix

@@ -0,0 +1,38 @@
+{ lib, stdenv, fetchFromGitHub, ncurses }:
+
+stdenv.mkDerivation rec {
+  pname = "sl";
+  version = "5.05";
+
+  src = fetchFromGitHub {
+    owner = "eyJhb";
+    repo = "sl";
+    rev = version;
+    sha256 = "11a1rdgb8wagikhxgm81g80g5qsl59mv4qgsval3isykqh8729bj";
+  };
+
+  buildInputs = [ ncurses ];
+
+  makeFlags = [ "CC:=$(CC)" ];
+
+  installPhase = ''
+    runHook preInstall
+
+    install -Dm755 -t $out/bin sl
+    install -Dm644 -t $out/share/man/man1 sl.1{,.ja}
+
+    runHook postInstall
+  '';
+
+  meta = with lib; {
+    description = "Steam Locomotive runs across your terminal when you type 'sl'";
+    homepage = "http://www.tkl.iis.u-tokyo.ac.jp/~toyoda/index_e.html";
+    license = rec {
+      shortName = "Toyoda Masashi's free software license";
+      fullName = shortName;
+      url = "https://github.com/eyJhb/sl/blob/master/LICENSE";
+    };
+    maintainers = with maintainers; [ eyjhb ];
+    platforms = platforms.unix;
+  };
+}