RFR: 8217472: Add attenuation for PointLight [v11]

[Nir Lisker]

> CSR: https://bugs.openjdk.java.net/browse/JDK-8218264

Nir Lisker has updated the pull request incrementally with one additional commit since the last revision:

  Addressed review comments

-------------

Changes:
  - all: https://git.openjdk.java.net/jfx/pull/43/files
  - new: https://git.openjdk.java.net/jfx/pull/43/files/3ab051d2..2c9af767

Webrevs:
 - full: https://webrevs.openjdk.java.net/jfx/43/webrev.10
 - incr: https://webrevs.openjdk.java.net/jfx/43/webrev.09-10

  Stats: 134 lines in 10 files changed: 125 ins; 1 del; 8 mod
  Patch: https://git.openjdk.java.net/jfx/pull/43.diff
  Fetch: git fetch https://git.openjdk.java.net/jfx pull/43/head:pull/43

PR: https://git.openjdk.java.net/jfx/pull/43