RFR(trivial): 8232593: [TESTBUG] runtime/cds/CheckDefaultArchiveFile.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-8232593
Webrev: http://cr.openjdk.java.net/~jiefu/8232593/webrev.00/

This bug was found while we were debugging the cds feature on mips.
When cds was disabled, only this one failed under hotspot/jtreg/runtime/cds.
So it might be better to fix it.

Thanks a lot.
Best regards,
Jie