make_disc_trees.pl: add components to Contents-firmware indices

All three columns could be aligned, but I'm not sure how many characters
should be allocated to the package filename. Alternatively, we could
scratch alignment altogether, and let interested users use column -t on
the file when debugging.

tools/make_disc_trees.pl

@@ -1245,7 +1245,7 @@ sub add_firmware_stuff {
     while (defined(my $line = <DPKGC>)) {
 	chomp $line;
 	if ($line =~ m,^[-|l]\S+\s+\S+\s+\d+\s+\S+\s+\S+\s+./(\S+/firmware/\S+)$,) {
-	    printf OFILE "%-55s %s\n", "/$1", $base_file;
+	    printf OFILE "%-55s %s %s\n", "/$1", $base_file, $component;
 	}
     }
     close DPKGC;