Skip `StraightLineTest` on Linux until [JDK-8296590](https://bugs.openjdk.org/browse/JDK-8296590) is fixed.
------------- Commit messages: - 8296592: Skip failing test StraightLineTest on Linux Changes: https://git.openjdk.org/jfx/pull/943/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=943&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8296592 Stats: 5 lines in 1 file changed: 5 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jfx/pull/943.diff Fetch: git fetch https://git.openjdk.org/jfx pull/943/head:pull/943 PR: https://git.openjdk.org/jfx/pull/943
