[GNC] BackupGnuCash updated for Java 11

[Frank H. Ellenberger]

Hi Greg,

Am 04.03.20 um 12:58 schrieb Greg Feneis:
> How does one find out more about BackupGnuCash, what it does and so forth?
> 
> Kind regards, Greg Feneis
> (Pixel 3)

see
https://github.com/goodvibes2/BackupGnuCashLinux/blob/master/src/backupgnucash/classes/org/openjfx/README.md

Regards
Frank