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/widelands/bincmake.patch

@@ -0,0 +1,21 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -25,6 +25,8 @@
+ # Packagers (or people using make install) have to set this variable to an absolute path.
+ wl_set_if_unset(WL_INSTALL_DATADIR "./data")
+ 
++wl_set_if_unset(WL_INSTALL_BINARY "./bin")
++
+ if("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
+   if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.7)
+     message(FATAL_ERROR "Widelands needs GCC >= 4.7 to compile.")
+
+--- a/cmake/WlFunctions.cmake
++++ b/cmake/WlFunctions.cmake
+@@ -276,5 +276,5 @@
+ 
+   #Quoting the CMake documentation on DESTINATION:
+   #"If a relative path is given it is interpreted relative to the value of CMAKE_INSTALL_PREFIX"
+-  install(TARGETS ${NAME} DESTINATION "." COMPONENT ExecutableFiles)
++  install(TARGETS ${NAME} DESTINATION ${WL_INSTALL_BINARY} COMPONENT ExecutableFiles)
+ endfunction()