[jdk13u-dev] RFR: 8250894: Provide a configure option to build and run against the platform libharfbuzz

[Olga Mikhaltsova]

I'd like to backport JDK-8250894 to jdk13u for parity with jdk11u.
The original patch applies almost cleanly except the 2 files because of the locations' differences:
1) make/lib/Awt2dLibraries.gmk instead of make/modules/java.desktop/lib/Awt2dLibraries.gmk;
2) make/copy/Copy-java.desktop.gmk instead of make/modules/java.desktop/Copy.gmk

No regressions in tests.

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Commit messages:
 - Backport 84e397b4de6495caa8bbd5d5481305f0bf3e9d06

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/303/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=303&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8250894
  Stats: 127 lines in 5 files changed: 64 ins; 0 del; 63 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/303.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/303/head:pull/303

PR: https://git.openjdk.java.net/jdk13u-dev/pull/303