Squashed 'external/devlib/' changes from 17374cf..37a6b4f

37a6b4f target: a valid sha1 must be concatenated with the kernel version
1ddbb75 uilts/android: Fix parameters to `adb_kill_server`
696dec9 utils/android: Ensure that adb_server is propergated to helper functions

git-subtree-dir: external/devlib
git-subtree-split: 37a6b4f96d49b85ad39965f3dc31ab9f7de7edf1