[jdk17u-dev] RFR: 8300692: GCC 12 reports some compiler warnings in bundled freetype

[Dan Lutker]

Another backport to enable building with GCC 12, local builds with other required patches to enable GCC12 and tier1/2 are passing.

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Commit messages:
 - Backport a6c2a2ae79be6810dca55b13bfc8a7625f25d48d

Changes: https://git.openjdk.org/jdk17u-dev/pull/1115/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1115&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8300692
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1115.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/1115/head:pull/1115

PR: https://git.openjdk.org/jdk17u-dev/pull/1115