Merge libubox with the version 2016.02.26 from its git.

3P/libubox/json_script.h

@@ -28,6 +28,7 @@ struct json_script_ctx {
 	struct blob_buf buf;
 
 	uint32_t run_seq;
+	bool abort;
 
 	/*
 	 * handle_command: handle a command that was not recognized by the
@@ -99,6 +100,18 @@ void json_script_run(struct json_script_ctx *ctx, const char *filename,
 
 void json_script_run_file(struct json_script_ctx *ctx, struct json_script_file *file,
 			  struct blob_attr *vars);
+
+/*
+ * json_script_abort - abort current json script run
+ *
+ * to be called from a script context callback
+ */
+static inline void
+json_script_abort(struct json_script_ctx *ctx)
+{
+	ctx->abort = true;
+}
+
 /*
  * json_script_eval_string - evaluate a string and store the result
  *