Attempt alliedmodders#2 at meaningful bootstrap error message.

Author: TheDS

tools/buildbot/bootstrap.pl

@@ -54,7 +54,7 @@
 	}
 	print "$result\n";
 	if ($? != 0) {
-		die('Could not configure: $!\n');
+		die("Could not configure: $!\n");
 	}
 	open(FILE, '>sentinel');
 	print FILE "this is nothing.\n";