bin/.android-set-outdir: do not use out because it may hang make
bin/android-make: use mount for out_dir
bin/douban: random channel
bin/gerrit-push-review: allow setting remote
bin/replace-ramdisk: for root
bin/repo-remote: all setting remote
etc/dir-locals/kernel/.dir-locals.el: from ~/src/linux

Signed-off-by: Bao Haojun <baohaojun@gmail.com>