RFR: 8260674: ProblemList jdk/incubator/vector/VectorHash.java in Xcomp configs

[Daniel D.Daugherty]

A trivial fix to ProblemList jdk/incubator/vector/VectorHash.java in Xcomp configs.
I'm trying to reduce the noise is in the CI.

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Commit messages:
 - 8260674: ProblemList jdk/incubator/vector/VectorHash.java in Xcomp configs

Changes: https://git.openjdk.java.net/jdk/pull/2321/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2321&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260674
  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2321.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2321/head:pull/2321

PR: https://git.openjdk.java.net/jdk/pull/2321