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/applications/audio/jackmix/no_error.patch

@@ -0,0 +1,13 @@
+diff --git a/SConstruct b/SConstruct
+index 8bf6517..a432aa9 100644
+--- a/SConstruct
++++ b/SConstruct
+@@ -16,7 +16,7 @@ env = Environment(
+ env.Replace(LIBS="")
+ env.Replace(LIBPATH="")
+ 
+-env.MergeFlags(['-Wall', '-Werror', '-g', '-fpic', '-std=c++11'])
++env.MergeFlags(['-g', '-fpic', '-std=c++11'])
+ 
+ tests = {}
+ tests.update(env['PKGCONFIG_TESTS'])