This PR adds 4 missing JNI symbols to the WebKit map file on Linux, matching the equivalent symbols on macOS. The absence of these symbols currently causes the JNI call from Java to native to get an `UnsatisfiedLinkError`.
After adding these 4 missing symbols, the manual test passes. --------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - WebSocket throws link error on Linux Changes: https://git.openjdk.org/jfx/pull/2359/files Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=2359&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8396583 Stats: 4 lines in 1 file changed: 4 ins; 0 del; 0 mod Patch: https://git.openjdk.org/jfx/pull/2359.diff Fetch: git fetch https://git.openjdk.org/jfx.git pull/2359/head:pull/2359 PR: https://git.openjdk.org/jfx/pull/2359
