Add handling for 'sso' paths to genrepo scripts

Clients may sync via 'sso' instead of 'rpc' or 'https'. Add handling for
repositories which have 'sso' as their source URL.

Test: Ran genrepo.py from a repo that was synced via 'sso'.
Change-Id: Id351f0e56ccf3ab3f23de9910b34a6ce0a5948cf
1 file changed