fix(script): No need to ever exit 1 in a pacman hook context

arch-needs-restart.sh

@@ -29,4 +29,7 @@ if [[ $active_kernel != $current_kernel ]]; then
     echo "# KERNEL: reboot required"
     rc=0
 fi
-exit $rc
+
+if [[ $rc == '1' ]]; then
+    echo "# No reboot required"
+fi