Move common/chromeos_utility.c to lib_generic/chromeos/utility.c

Refactor and put as much of code in one place as possible.

Change-Id: Ib8a15b93cbb8dd92b4740dac6ce618df318837b8

BUG=None
TEST=Run emerge successfully

Review URL: http://codereview.chromium.org/4195004
3 files changed