[jdk15u-dev] RFR: 8283323: libharfbuzz optimization level results in extreme build times

[Yuri Nesterenko]

Almost clean backport with small context difference.

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Commit messages:
 - Backport 2c43ecb43fa3c94b69478039f1cd70ed4a577768

Changes: https://git.openjdk.org/jdk15u-dev/pull/316/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk15u-dev&pr=316&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8283323
  Stats: 9 lines in 1 file changed: 8 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk15u-dev/pull/316.diff
  Fetch: git fetch https://git.openjdk.org/jdk15u-dev pull/316/head:pull/316

PR: https://git.openjdk.org/jdk15u-dev/pull/316