libyang UPDATE add prefix for common and config files

To avoid include conflicts.
diff --git a/src/log.h b/src/log.h
index 8999910..b02a290 100644
--- a/src/log.h
+++ b/src/log.h
@@ -18,7 +18,7 @@
 
 #include <stdint.h>
 
-#include "config.h"
+#include "ly_config.h"
 
 #ifdef __cplusplus
 extern "C" {