Rename include directory to mbedtls
diff --git a/tests/suites/helpers.function b/tests/suites/helpers.function
index 0f07485..54786af 100644
--- a/tests/suites/helpers.function
+++ b/tests/suites/helpers.function
@@ -1,5 +1,5 @@
 #if defined(POLARSSL_PLATFORM_C)
-#include "polarssl/platform.h"
+#include "mbedtls/platform.h"
 #else
 #include <stdio.h>
 #define polarssl_printf     printf