Fixing a problem that postbootscript cannot be written if there are multiple kit components

git-svn-id: https://svn.code.sf.net/p/xcat/code/xcat-core/trunk@14457 8638fb3e-16cb-4fca-ae20-7b5d299a9bcd

xCAT-server/lib/xcat/plugins/kit.pm

@@ -338,6 +338,8 @@ sub assign_to_osimage
 
                     if ( $match ) {
                         next;
+                    } elsif ( !$added ) {
+                        push @newscripts, $formatedkitcomp;
                     }
 
                     my $osimagescripts = join ',', @newscripts;