[jdk15u-dev] RFR: 8290334: Update FreeType to 2.12.1

[Yuri Nesterenko]

backporting for parity with major releases.
Clean backport. Sanity testing looks OK.

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Commit messages:
 - Backport ea8b75cfe453f5806a96ca85dd5e31724750a88f

Changes: https://git.openjdk.org/jdk15u-dev/pull/241/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk15u-dev&pr=241&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8290334
  Stats: 67 lines in 19 files changed: 10 ins; 8 del; 49 mod
  Patch: https://git.openjdk.org/jdk15u-dev/pull/241.diff
  Fetch: git fetch https://git.openjdk.org/jdk15u-dev pull/241/head:pull/241

PR: https://git.openjdk.org/jdk15u-dev/pull/241