change test function includes to use one convention
diff --git a/tests/suites/test_suite_entropy.function b/tests/suites/test_suite_entropy.function
index 6d137ad..c46246c 100644
--- a/tests/suites/test_suite_entropy.function
+++ b/tests/suites/test_suite_entropy.function
@@ -1,5 +1,5 @@
 /* BEGIN_HEADER */
-#include <polarssl/entropy.h>
+#include "polarssl/entropy.h"
 
 /*
  * Number of calls made to entropy_dummy_source()