Fix unusual include style

Project-internal header files should be included using " ", not < >.

Author: petere

src/test/modules/test_rls_hooks/test_rls_hooks.h

@@ -14,7 +14,7 @@
 #ifndef TEST_RLS_HOOKS_H
 #define TEST_RLS_HOOKS_H
 
-#include <rewrite/rowsecurity.h>
+#include "rewrite/rowsecurity.h"
 
 /* Return set of permissive hooks based on CmdType and Relation */
 extern List *test_rls_hooks_permissive(CmdType cmdtype, Relation relation);