RFR: 8279995: jpackage --add-launcher option should allow overriding description [v3]

[Alexander Matveev]

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

Alexander Matveev has updated the pull request incrementally with one additional commit since the last revision:

  8279995: jpackage --add-launcher option should allow overriding description [v3]

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7399/files
  - new: https://git.openjdk.java.net/jdk/pull/7399/files/dbb36905..c5fea599

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7399&range=02
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7399&range=01-02

  Stats: 64 lines in 2 files changed: 26 ins; 19 del; 19 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