Fix missing newline at end of desc file

Author: smowton

regression/strings-smoke-tests/java_int_to_string/test2_bug.desc

@@ -9,4 +9,4 @@ assertion.* line 10 .* FAILURE$
 non equal types
 --
 When string-max-length is not set, the solver can run out of memory in
-an unpredictable way.
+an unpredictable way.