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/db/CVE-2017-10140-cwd-db_config.patch

@@ -0,0 +1,11 @@
+--- db-5.3.28/src/env/env_open.c.old	2017-06-26 10:32:11.011419981 +0200
++++ db-5.3.28/src/env/env_open.c	2017-06-26 10:32:46.893721233 +0200
+@@ -473,7 +473,7 @@
+ 	env->db_mode = mode == 0 ? DB_MODE_660 : mode;
+ 
+ 	/* Read the DB_CONFIG file. */
+-	if ((ret = __env_read_db_config(env)) != 0)
++	if (env->db_home != NULL && (ret = __env_read_db_config(env)) != 0)
+ 		return (ret);
+ 
+ 	/*