RFR: 8217472: Add attenuation for PointLight [v8]

[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:

  Fixed whitespaces

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Changes:
  - all: https://git.openjdk.java.net/jfx/pull/43/files
  - new: https://git.openjdk.java.net/jfx/pull/43/files/31060231..d77204aa

Webrevs:
 - full: https://webrevs.openjdk.java.net/jfx/43/webrev.07
 - incr: https://webrevs.openjdk.java.net/jfx/43/webrev.06-07

  Stats: 13 lines in 3 files changed: 0 ins; 0 del; 13 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