[jdk17u-dev] RFR: 8299255: Unexpected round errors in FreetypeFontScaler

[Goetz Lindenmaier]

I backport this for parity with 17.0.10-oracle.

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Commit messages:
 - Backport 26868c1ac471c3b305b1d15e3075de0baa9319d2

Changes: https://git.openjdk.org/jdk17u-dev/pull/1732/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1732&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299255
  Stats: 74 lines in 2 files changed: 69 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1732.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1732/head:pull/1732

PR: https://git.openjdk.org/jdk17u-dev/pull/1732