Add a tag for removing crosh_workarounds. Also add options for manipulating /etc/lsb-release.

Adds --crosh_workarounds (only removal is supported), --remove_test_label (for removing test in /etc/lsb-release) and --change_dev_to_beta (for changing "dev" -> "beta" in /etc/lsb-release)

BUG=chromium-os:5920
TEST=manual

Change-Id: Id4c94d76a6d8794a4d134790d0c2f5d4a336084f

Review URL: http://codereview.chromium.org/3781012
1 file changed