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/libraries/htmlcxx/ptrdiff.patch

@@ -0,0 +1,13 @@
+diff -rc htmlcxx-orig-0.85/html/tree.h htmlcxx-0.85/html/tree.h
+*** htmlcxx-orig-0.85/html/tree.h	2015-09-02 13:57:17.988688798 +0200
+--- htmlcxx-0.85/html/tree.h	2015-09-02 13:57:52.737768811 +0200
+***************
+*** 45,50 ****
+--- 45,51 ----
+  #ifndef tree_hh_
+  #define tree_hh_
+  
++ #include <cstddef>
+  #include <cassert>
+  #include <memory>
+  #include <stdexcept>