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/misc/epr/default.nix

@@ -0,0 +1,21 @@
+{ lib, python3Packages, fetchFromGitHub }:
+
+python3Packages.buildPythonApplication rec {
+  pname = "epr";
+  version = "2.3.0b";
+
+  src = fetchFromGitHub {
+    owner = "wustho";
+    repo = pname;
+    rev = "v${version}";
+    sha256 = "1a6md3015284hzmx0sby5kl59p7lwv73sq7sid35vrr15zrl0aw7";
+  };
+
+  meta = with lib; {
+    description = "CLI Epub Reader";
+    homepage = "https://github.com/wustho/epr";
+    license = licenses.mit;
+    maintainers = [ maintainers.Br1ght0ne ];
+    platforms = platforms.all;
+  };
+}