GitLab

Convert numeric error code from libusb into human readable strings and
log them. Some of these errors should, in addition, be passed up to the
running script.

BUG=

Review URL: https://codereview.chromium.org/344793009

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@278769 0039d316-1c4b-4281-b951-d872f2087c98