toysolver-0.0.2: samples/wbo/example2.wbo

* #variable= 2 #constraint= 3 #soft= 2 mincost= 2 maxcost= 3 sumcost= 5
soft: 6 ;
[2] +1 x1 >= 1 ;
[3] +1 x2 >= 1 ;
-1 x1 -1 x2 >= -1 ;