libyang UPDATE add prefix for common and config files

To avoid include conflicts.
diff --git a/tests/utests/basic/test_plugins.c b/tests/utests/basic/test_plugins.c
index de13c0b..d533a07 100644
--- a/tests/utests/basic/test_plugins.c
+++ b/tests/utests/basic/test_plugins.c
@@ -17,7 +17,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "config.h"
+#include "ly_config.h"
 #include "plugins.h"
 #include "plugins_internal.h"