RFR: 8279995: jpackage --add-launcher option should allow overriding description [v5]

[Alexander Matveev]

> Added ability to override description for additional launchers via "description" property.

Alexander Matveev 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 master
 - 8279995: jpackage --add-launcher option should allow overriding description [v4]
 - 8279995: jpackage --add-launcher option should allow overriding description [v3]
 - 8279995: jpackage --add-launcher option should allow overriding description [v2]
 - 8279995: jpackage --add-launcher option should allow overriding description

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Changes: https://git.openjdk.java.net/jdk/pull/7399/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7399&range=04
  Stats: 77 lines in 7 files changed: 67 ins; 0 del; 10 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7399.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7399/head:pull/7399

PR: https://git.openjdk.java.net/jdk/pull/7399