RFR: JDK-8275786: New javadoc option to add script files to generated documentation

[Hannes Wallnöfer]

JDK-8275786: New javadoc option to add script files to generated documentation

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Commit messages:
 - Add trailing newline
 - Undo move of standard script files into script-dir
 - JDK-8275786: New javadoc option to add script files to generated documentation

Changes: https://git.openjdk.java.net/jdk/pull/6173/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=6173&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8275786
  Stats: 134 lines in 12 files changed: 105 ins; 5 del; 24 mod
  Patch: https://git.openjdk.java.net/jdk/pull/6173.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/6173/head:pull/6173

PR: https://git.openjdk.java.net/jdk/pull/6173