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/games/ball-and-paddle/getenv-decl.patch

@@ -0,0 +1,13 @@
+Make the getenv(3) declaration visible.
+
+--- ballandpaddle-0.8.1/src/settingsmanager.cpp	2009-07-08 02:13:16.000000000 +0200
++++ ballandpaddle-0.8.1/src/settingsmanager.cpp	2009-07-16 23:30:28.000000000 +0200
+@@ -17,6 +17,7 @@
+  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  **/
+ 
++#include <stdlib.h>
+ #include "settingsmanager.h"
+ 
+ SettingsManager::SettingsManager ()
+