change test function includes to use one convention
diff --git a/tests/suites/test_suite_xtea.function b/tests/suites/test_suite_xtea.function
index 74ca678..d22c7fd 100644
--- a/tests/suites/test_suite_xtea.function
+++ b/tests/suites/test_suite_xtea.function
@@ -1,5 +1,5 @@
 /* BEGIN_HEADER */
-#include <polarssl/xtea.h>
+#include "polarssl/xtea.h"
 /* END_HEADER */
 
 /* BEGIN_DEPENDENCIES