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/development/lua-modules/generic/default.nix

@@ -0,0 +1,28 @@
+{ lua, writeText, toLuaModule }:
+
+{ disabled ? false
+, propagatedBuildInputs ? [ ]
+, ...
+} @ attrs:
+
+if disabled then
+  throw "${attrs.name} not supported by interpreter lua-${lua.luaversion}"
+else
+  toLuaModule (lua.stdenv.mkDerivation (
+    {
+      makeFlags = [
+        "PREFIX=$(out)"
+        "LUA_LIBDIR=$(out)/lib/lua/${lua.luaversion}"
+        "LUA_INC=-I${lua}/include"
+      ];
+    }
+    //
+    attrs
+    //
+    {
+      name = "lua${lua.luaversion}-" + attrs.pname + "-" + attrs.version;
+      propagatedBuildInputs = propagatedBuildInputs ++ [
+        lua # propagate it for its setup-hook
+      ];
+    }
+  ))