RFR: JDK-8263155: Allow additional contents for DMG [v2]

[Andy Herrick]

> JDK-8263155: Allow additional contents for DMG

Andy Herrick has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains five commits:

 -     Merge branch 'master' into JDK-8263155
 - Merge branch 'master' into JDK-8263155
 - JDK-8263155: Allow additional contents for DMG
 - JDK-8263155: Allow additional contents for DMG
 - JDK-8263155: Allow additional contents for DMG

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Changes: https://git.openjdk.java.net/jdk/pull/5912/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5912&range=01
  Stats: 171 lines in 8 files changed: 154 ins; 1 del; 16 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5912.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5912/head:pull/5912

PR: https://git.openjdk.java.net/jdk/pull/5912