RFR: 8344899: Map RT-nnnn bug IDs to JDK-mmmmmmm in JavaFX sources

[Marius Hanl]

This PR changes all `RT-XXXX` references to `JDK-XXXXXXX`.
It also removes all `http://javafx-jira.kenai.com/browse/` occurrences.

As discussed, this will help a lot when looking up old issues, especially since not everybody know how to do a lookup with the `RT-XXXX` number in the JIRA.

Thanks to @kevinrushforth who provided the mapping!
I wrote a small Java program that replaces all the occurrences. This includes the following files:
- .`java, .css, .m, .h, .cc, .vert, .jsl, .c, .cpp`

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Commit messages:
 - 8344899: Map RT-nnnn bug IDs to JDK-mmmmmmm in JavaFX sources

Changes: https://git.openjdk.org/jfx/pull/1648/files
  Webrev: https://webrevs.openjdk.org/?repo=jfx&pr=1648&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8344899
  Stats: 1015 lines in 361 files changed: 0 ins; 1 del; 1014 mod
  Patch: https://git.openjdk.org/jfx/pull/1648.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1648/head:pull/1648

PR: https://git.openjdk.org/jfx/pull/1648