veyron/veyron/lib/modules/core: add exec command to shell

This change adds an exec command to the shell. The purpose of this
change is to allow the integration test framework to allow integration
test authors to execute arbitrary system commands through the Veyron
shell.

Change-Id: I6d1730e6c067f6b6bda9ecce01a3149b30a3f82b
3 files changed
tree: 3cad2f379419f4994cbeaeb36eb69ebbe0dffde9
  1. lib/
  2. profiles/
  3. runtimes/
  4. security/
  5. services/
  6. tools/