bin/adb-send-weixin: fix adb devices holding the lock
bin/douban-random-local-play: randomly play a song saved locally from douban
bin/re-xmodmap: make sure the Super- works (xdotool-delayed)
bin/switch-touchpad: for vostro

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