Rebase private OTA libs on 2.7

libs/ota-common/include/mgos_updater_util.h

@@ -0,0 +1,22 @@
+/*
+ * Copyright (c) 2014-2016 Cesanta Software Limited
+ * All rights reserved
+ */
+
+#ifndef CS_FW_SRC_MGOS_UPDATER_UTIL_H_
+#define CS_FW_SRC_MGOS_UPDATER_UTIL_H_
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif /* __cplusplus */
+
+/* Function to merge filesystems. */
+bool mgos_upd_merge_fs(const char *old_fs_path, const char *new_fs_path);
+
+#ifdef __cplusplus
+}
+#endif /* __cplusplus */
+
+#endif /* CS_FW_SRC_MGOS_UPDATER_UTIL_H_ */