RFR: JDK-8297230: Update Marlin2D to 0.9.4.6

[Laurent Bourgès]

Initial PR

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Commit messages:
 - JDK-8297230: Update Marlin2D to 0.9.4.6

Changes: https://git.openjdk.org/jdk/pull/11225/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=11225&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8297230
  Stats: 4142 lines in 37 files changed: 2668 ins; 1102 del; 372 mod
  Patch: https://git.openjdk.org/jdk/pull/11225.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/11225/head:pull/11225

PR: https://git.openjdk.org/jdk/pull/11225