RFR: 8292633: runtime/cds/appcds/dynamicArchive/CDSStreamTestDriver.java fails to compile

[Christian Stein]

This change adds the missing import statement of https://github.com/openjdk/jdk/commit/62a7fc60d3b3a27525fc01930834dab6f89bd451 introduced by https://bugs.openjdk.org/browse/JDK-8292315

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Commit messages:
 - 8292633: runtime/cds/appcds/dynamicArchive/CDSStreamTestDriver.java fails to compile

Changes: https://git.openjdk.org/jdk/pull/9928/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=9928&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8292633
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/9928.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9928/head:pull/9928

PR: https://git.openjdk.org/jdk/pull/9928