[jdk11u-dev] RFR: 8209023: fix 2 compiler tests to avoid JDK-8208690

[Matthias Baesken]

8209023: fix 2 compiler tests to avoid JDK-8208690

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Commit messages:
 - Backport 77204ca163676645df24b778e2053210658a15dc

Changes: https://git.openjdk.org/jdk11u-dev/pull/1645/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1645&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8209023
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1645.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1645/head:pull/1645

PR: https://git.openjdk.org/jdk11u-dev/pull/1645