Remove -boot-info-table from s390 boot.iso creation (#1478448)

It corrupts the kernel+initrd and isn't needed when booting on s390.

Related: rhbz#1478448
(cherry picked from commit df35857c9b)

share/templates.d/99-generic/s390.tmpl

@@ -69,7 +69,7 @@ runcmd mk-s390-cdboot -i ${outroot}/${KERNELDIR}/kernel.img \
 ## make boot.iso
 runcmd mkisofs -o ${outroot}/images/boot.iso \
        -b ${BOOTDIR}/cdboot.img -c ${BOOTDIR}/boot.cat \
-       -boot-load-size 4 -boot-info-table -no-emul-boot \
+       -boot-load-size 4 -no-emul-boot \
        -R -J -V '${isolabel}' -T -graft-points \
        ${BOOTDIR}=${outroot}/${BOOTDIR} \
        ${filegraft}