Fix missing generic.ins on s390x
commit 0c4e1955 accidentally dropped the generic.ins file from the iso. This restores that graft point to the xorrisofs call.
Resolves: rhbz#2044448
commit 0c4e1955 accidentally dropped the generic.ins file from the iso. This restores that graft point to the xorrisofs call.
Resolves: rhbz#2044448