Please review fix [2] for jpackage bug [1].The fix adds verification there are `xdg-icon-resource` commands in Linux packages for file associations with icons.
- Alexey [1] https://bugs.openjdk.java.net/browse/JDK-8233244 [2] http://cr.openjdk.java.net/~asemenyuk/8233244/webrev.00
