RFR(trivial): 8232692: [TESTBUG] compiler/aot/fingerprint/SelfChangedCDS.java fails when cds is disabled

[Jie Fu]

Hi all,

May I get reviews for this one-line fix?

JBS:    https://bugs.openjdk.java.net/browse/JDK-8232692
Webrev: http://cr.openjdk.java.net/~jiefu/8232692/webrev.00/

This bug was found after JDK-8232616 had been fixed.
When cds is disabled, all tests under compiler/aot passed except this one.
So it might be better to fix it.

Thanks a lot.
Best regards,
Jie