RFR: 8254348: Build fails when cds is disabled after JDK-8247536

[Jie Fu]

Please review this trivial fix.
Thanks.

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Commit messages:
 - 8254348: Build fails when cds is disabled after JDK-8247536

Changes: https://git.openjdk.java.net/jdk/pull/586/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=586&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8254348
  Stats: 4 lines in 1 file changed: 4 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/586.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/586/head:pull/586

PR: https://git.openjdk.java.net/jdk/pull/586