[jdk17u-dev] RFR: 8338668: Test javax/swing/JFileChooser/8080628/bug8080628.java doesn't test for GTK L&F

[Goetz Lindenmaier]

I backport this for parity with 17.0.15-oracle.

Resolved Copyright, probably clean.

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Commit messages:
 - Backport b8e8e965e541881605f9dbcd4d9871d4952b9232

Changes: https://git.openjdk.org/jdk17u-dev/pull/3097/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=3097&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8338668
  Stats: 14 lines in 1 file changed: 12 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/3097.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/3097/head:pull/3097

PR: https://git.openjdk.org/jdk17u-dev/pull/3097