[lworld] RFR: 8241918: [lworld] Build failures after JDK-8236522

[Tobias Hartmann]

workspace/open/src/hotspot/share/utilities/stringUtils.cpp:276:13: error: 'bool class_list_match_sane()' declared
'static' but never defined [-Werror=unused-function] [2020-03-31T06:37:08,459Z] static bool class_list_match_sane();
[2020-03-31T06:37:08,459Z] ^~~~~~~~~~~~~~~~~~~~~
[2020-03-31T06:37:08,822Z] cc1plus: all warnings being treated as errors

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Commit messages:
 - 8241918: [lworld] Build failures after JDK-8236522

Changes: https://git.openjdk.java.net/valhalla/pull/9/files
 Webrev: https://webrevs.openjdk.java.net/valhalla/9/webrev.00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8241918
  Stats: 5 lines in 1 file changed: 0 ins; 2 del; 3 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/9.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/9/head:pull/9

PR: https://git.openjdk.java.net/valhalla/pull/9