Allow '.' in user name on gclient ssh connection

For example, my id is 'kangil.han', but it fails during parsing.
So this patch fixes it.

Review URL: https://codereview.chromium.org/27484002

git-svn-id: svn://svn.chromium.org/chrome/trunk/tools/depot_tools@228937 0039d316-1c4b-4281-b951-d872f2087c98
1 file changed