libyang UPDATE add prefix for common and config files

To avoid include conflicts.
diff --git a/src/printer_data.c b/src/printer_data.c
index ea330c7..a0eeaea 100644
--- a/src/printer_data.c
+++ b/src/printer_data.c
@@ -16,8 +16,8 @@
 
 #include <stdio.h>
 
-#include "common.h"
 #include "log.h"
+#include "ly_common.h"
 #include "out.h"
 #include "out_internal.h"
 #include "printer_internal.h"