tree fd24d4d0e5d45224f3c31c167034c46bbc3ead30
parent 66aee757748ab0a628cd6ee26e34c48b95543216
author YoungSeok Yoon <youngseokyoon@google.com> 1461971956 -0700
committer YoungSeok Yoon <youngseokyoon@google.com> 1461971956 -0700

feat(shell): add "madb shell" command

This adds "madb shell" command, which is a shorthand syntax for
"madb exec shell", which is an expected feature from most users.

Change-Id: I51a4d03d87c8f227f19114773f2f9d29408e620f
Ref: #27