Please review fix [2] for jpackage bug [1].The fix is to put value of `Exec` property of .desktop files generated by jpackage in double quotes if the value of the propery contains whitespace characters.
- Alexey [1] https://bugs.openjdk.java.net/browse/JDK-8264244 [2] http://cr.openjdk.java.net/~asemenyuk/8264244/webrev.00
