libyang UPDATE add prefix for common and config files

To avoid include conflicts.
diff --git a/tests/utests/basic/test_common.c b/tests/utests/basic/test_common.c
index 46b80ab..36269e7 100644
--- a/tests/utests/basic/test_common.c
+++ b/tests/utests/basic/test_common.c
@@ -14,7 +14,7 @@
 #define _UTEST_MAIN_
 #include "utests.h"
 
-#include "common.h"
+#include "ly_common.h"
 
 static void
 test_utf8(void **UNUSED(state))