RFR: 8200192: Verify exported symbols in java.desktop

[Daniel Jeliński]

Please review this patch that removes unnecessary exports from libawt and libfreetype.

Verified that:
- mach5 client libs tests pass
- both release and debug builds finish successfully

Did not verify the other issues reported in the linked JBS ticket.

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Commit messages:
 - Export selected symbols only

Changes: https://git.openjdk.org/jdk/pull/11742/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11742&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8200192
  Stats: 9 lines in 2 files changed: 0 ins; 8 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/11742.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11742/head:pull/11742

PR: https://git.openjdk.org/jdk/pull/11742