[jdk15u-dev] RFR: 8249821: Separate libharfbuzz from libfontmanager

[Dmitry Cherepanov]

JDK-8249821: Separate libharfbuzz from libfontmanager

Clean backport. Will create separate PR for JDK-8250605: Linux x86_32 builds fail after JDK-8249821

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Commit messages:
 - Backport b1ff2bd00a6a289be29158e0acd134151b468d41

Changes: https://git.openjdk.java.net/jdk15u-dev/pull/138/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk15u-dev&pr=138&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8249821
  Stats: 77 lines in 199 files changed: 55 ins; 10 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk15u-dev/pull/138.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk15u-dev pull/138/head:pull/138

PR: https://git.openjdk.java.net/jdk15u-dev/pull/138