Ignore dl even if it’s a symlink

Signed-off-by: Thorsten Glaser <tg@mirbsd.org>

.gitignore

@@ -33,7 +33,7 @@
 /config/*.o
 /config/lxdialog/*.o
 /make.log
-/dl/
+/dl
 /package/Config.in.auto*
 /package/pkgconfigs.d/
 /package/*/Config.in