RFR: 8268120: Allow hardware cursor to be used on Monocle-EGL platforms

[Johan Vos]

Add EGL cursor implementation (Java + native) and the link to low-level drivers.
Fix for JDK-8268120

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Commit messages:
 - fix whitespace error
 - Add EGL cursor implementation (Java + native) and the link to low-level

Changes: https://git.openjdk.java.net/jfx/pull/527/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jfx&pr=527&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268120
  Stats: 150 lines in 4 files changed: 149 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jfx/pull/527.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/527/head:pull/527

PR: https://git.openjdk.java.net/jfx/pull/527