RFR: 8309814: [IR Framework] Dump socket output string in which IR encoding was not found

[Christian Hagedorn]

To better understand the low-frequency failure reported in [JDK-8309689](https://bugs.openjdk.org/browse/JDK-8309689), I suggest to additionally dump the socket output string, in which the IR encoding was not found, to better analyze the problem.

Thanks,
Christian

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Commit messages:
 - 8309814: [IR Framework] Dump socket output string in which IR encoding was not found

Changes: https://git.openjdk.org/jdk/pull/14410/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=14410&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8309814
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14410.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14410/head:pull/14410

PR: https://git.openjdk.org/jdk/pull/14410