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/libidn2/fix-error-darwin.patch

@@ -0,0 +1,20 @@
+diff --git a/src/idn2.c b/src/idn2.c
+index 6abbc72..804f0f2 100644
+--- a/src/idn2.c
++++ b/src/idn2.c
+@@ -31,7 +31,6 @@
+ #include <unistr.h>
+ 
+ /* Gnulib headers. */
+-#include "error.h"
+ #include "gettext.h"
+ #define _(String) dgettext (PACKAGE, String)
+ #include "progname.h"
+@@ -222,7 +219,7 @@ main (int argc, char *argv[])
+     }
+ 
+   if (ferror (stdin))
+-    error (EXIT_FAILURE, errno, "%s", _("input error"));
++    perror (_("input error"));
+ 
+   cmdline_parser_free (&args_info);