RFR: JDK-8169720 - jimage help message for --include option should be corrected

[Jim Laskey (Oracle)]

http://cr.openjdk.java.net/~jlaskey/8169720/webrev/index.html 
<http://cr.openjdk.java.net/~jlaskey/8169720/webrev/index.html>
https://bugs.openjdk.java.net/browse/JDK-8169720 
<https://bugs.openjdk.java.net/browse/JDK-8169720>