xdg-utils: Fix generic su
This update fixes the following issue for xdg-utils:
- bnc#776202: Fix generic su (bnc#776202)
note: the XSU variable is never used in the xdg-su script
and we dont have any xsu in 12.2 anyway
so it uses xterm+su
- Submitted by Bernhard Wiedemann (bmwiedemann)
Fixed bugs
bnc#776202
xdg-su broken on icewm