RFR: 8338759: Add extra diagnostic to java/net/InetAddress/ptr/Lookup.java

[serhiysachkov]

8338759: Add extra diagnostic to java/net/InetAddress/ptr/Lookup.java

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Commit messages:
 - 8338759: Add extra diagnostic to java/net/InetAddress/ptr/Lookup.java

Changes: https://git.openjdk.org/jdk/pull/21055/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=21055&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338759
  Stats: 3 lines in 1 file changed: 3 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/21055.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/21055/head:pull/21055

PR: https://git.openjdk.org/jdk/pull/21055