RFR: 8325176: Compiling native tests with clang on linux fails

[Magnus Ihse Bursie]

While we do not have automatic testing of using clang instead of gcc on linux, we try to keep it in working condition. This is still the case for the JDK itself, but there is a native test which fails to compile with clang. This should be fixed.

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Commit messages:
 - 8325176: Compiling native tests with clang on linux fails

Changes: https://git.openjdk.org/jdk/pull/17688/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17688&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325176
  Stats: 4 lines in 1 file changed: 4 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17688.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17688/head:pull/17688

PR: https://git.openjdk.org/jdk/pull/17688