[test] Add memcpy() self-tests

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/tests/tests.c

@@ -25,6 +25,7 @@ FILE_LICENCE ( GPL2_OR_LATER );
  */
 
 /* Drag in all applicable self-tests */
+REQUIRE_OBJECT ( memcpy_test );
 REQUIRE_OBJECT ( list_test );
 REQUIRE_OBJECT ( byteswap_test );
 REQUIRE_OBJECT ( base64_test );