RFR: JDK-8259926: Error in jpackage sample usage in the help text

[Andy Herrick]

JDK-8259926: Error in jpackage sample usage in the help text

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Commit messages:
 - JDK-8259926: Error in jpackage sample usage in the help text

Changes: https://git.openjdk.java.net/jdk/pull/3132/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3132&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259926
  Stats: 4 lines in 3 files changed: 1 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3132.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3132/head:pull/3132

PR: https://git.openjdk.java.net/jdk/pull/3132