[cros] Update OOBE network error message.
[cros] Update OOBE network error message.

BUG=chromium-os:8172
TEST=N/A

Review URL: http://codereview.chromium.org/6303008

git-svn-id: dd90618784b6a4b323ea0c23a071cb1c9e6f2ac7@71595 4ff67af0-8c30-449e-8e8b-ad334ec8d88c

wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser,wistoch/meego-app-browser