Set BLD_JAVA_8 in illumos.sh when building on OI
Set BLD_JAVA_8 in illumos.sh when building on OI

prakashsurya/openzfs-ci,openzfs/openzfs-ci,prakashsurya/openzfs-ci,openzfs/openzfs-ci,openzfs/openzfs-ci,prakashsurya/openzfs-ci