date:regexp:: fix regexp for skip suffix.

remove tail bin and _.

tower: http://tower.im/projects/1c0cd0c59ef941298c6e6b2ba6833b91/todos/dbe769864bb64aaaa6499e4179937006://tower.im/projects/1c0cd0c59ef941298c6e6b2ba6833b91/todos/dbe769864bb64aaaa6499e4179937006/

Change-Id: I0a5f545a382cf664f85074355084fb4082d04e2e