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/servers/xmpp/biboumi/catch.patch

@@ -0,0 +1,30 @@
+--- a/CMakeLists.txt
++++ b/CMakeLists.txt
+@@ -303,27 +303,6 @@
+ endforeach()
+ 
+ #
+-## Add a rule to download the catch unit test framework
+-#
+-include(ExternalProject)
+-ExternalProject_Add(catch
+-  GIT_REPOSITORY "https://lab.louiz.org/louiz/Catch.git"
+-  PREFIX "external"
+-  UPDATE_COMMAND ""
+-  CONFIGURE_COMMAND ""
+-  BUILD_COMMAND ""
+-  INSTALL_COMMAND ""
+-  )
+-set_target_properties(catch PROPERTIES EXCLUDE_FROM_ALL TRUE)
+-ExternalProject_Get_Property(catch SOURCE_DIR)
+-if(NOT EXISTS ${CMAKE_SOURCE_DIR}/tests/catch.hpp)
+-  target_include_directories(test_suite
+-    PUBLIC "${SOURCE_DIR}/single_include/"
+-    )
+-  add_dependencies(test_suite catch)
+-endif()
+-
+-#
+ ## Add some custom rules to launch the tests
+ #
+ add_custom_target(check COMMAND "test_suite"