RFR: 8366842: Update the classpath file of the graphics module [v2]

[Nir Lisker]

> Removed the the directories under "build" from the sources list in Eclipse since they can be platform-specific or just irrelevant for almost all cases. Contributors can add them manually as needed.
> 
> Another option is to mark them as optional.

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

  Make OS-specific sources optional

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

Changes:
  - all: https://git.openjdk.org/jfx/pull/1884/files
  - new: https://git.openjdk.org/jfx/pull/1884/files/a20f7fe3..8a65063a

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jfx&pr=1884&range=01
 - incr: https://webrevs.openjdk.org/?repo=jfx&pr=1884&range=00-01

  Stats: 17 lines in 1 file changed: 17 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jfx/pull/1884.diff
  Fetch: git fetch https://git.openjdk.org/jfx.git pull/1884/head:pull/1884

PR: https://git.openjdk.org/jfx/pull/1884