Don't exit 1 from 92-crashkernel.install if zipl is absent (#1993505)

At least, this is a plausible suspect for #1993505 - thanks to
@kevin for identifying it - and fixing it should be safe and
correct, so we may as well do it and see if it helps.

92-crashkernel.install

@@ -61,7 +61,7 @@ set_kernel_ck() {
 
 	[[ -f /etc/zipl.conf ]] && zipl_arg="--zipl"
 	grubby --args "$ck_cmdline" --update-kernel "$entry" $zipl_arg
-	[[ $zipl_arg ]] && zipl > /dev/null
+	[[ $zipl_arg ]] && zipl > /dev/null ||:
 }
 
 case "$COMMAND" in

kexec-tools.spec

@@ -5,7 +5,7 @@
 
 Name: kexec-tools
 Version: 2.0.22
-Release: 6%{?dist}
+Release: 7%{?dist}
 License: GPLv2
 Summary: The kexec/kdump userspace component
 
@@ -384,6 +384,9 @@ done
 %endif
 
 %changelog
+* Tue Aug 31 2021 Adam Williamson <awilliam@redhat.com> - 2.0.22-7
+- Don't exit 1 from 92-crashkernel.install if zipl is absent (#1993505)
+
 * Fri Aug 20 2021 Kairui Song <kasong@redhat.com> - 2.0.22-6
 - Remove hard requirement on grubby
 - Clear old crashkernl=auto in comment and doc