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/applications/editors/em/default.nix

@@ -0,0 +1,29 @@
+{ lib
+, stdenv
+, fetchurl
+}:
+
+stdenv.mkDerivation rec {
+  pname = "em";
+  version = "1.0.0";
+
+  src = fetchurl {
+    url = "http://pgas.freeshell.org/C/em/${pname}-${version}.tar.gz";
+    hash = "sha256-ijMBkl7U1f9MTXgli9kUFB8ttMG6TMQnxfDMP9AblTQ=";
+  };
+
+  meta = with lib; {
+    homepage = "http://pgas.freeshell.org/C/em/";
+    description = "Editor for Mortals";
+    longDescription = ''
+      Em is a QMC variant of the standard Unix text editor - ed. It includes all
+      of ed, so the documentation for ed is fully applicable to em. Em also has
+      a number of new commands and facilities designed to improve its
+      interaction and increase its usefulness to users at fast vdu terminals
+      (such as the ITT's at QMC).
+    '';
+    license = licenses.publicDomain;
+    maintainers = with maintainers; [ AndersonTorres ];
+    platforms = platforms.unix;
+  };
+}