.gitignore: Undo accidental commit.

SVN-Revision: 21420

.gitignore

 .*.swp
 /env
 /dl
+/.config
 /.config.old
 /bin
 /build_dir
@@ -8,5 +9,7 @@
 /tmp
 /logs
 /feeds
+/feeds.conf
+/files
 /package/feeds
 /package/openwrt-packages