tlsdated: pass -l and -v through to tlsdate

Supply these options to tlsdate as needed. The ultimate goal of these changes is
to avoid passing an arbitrary tlsdate argv to tlsdated.

Signed-off-by: Elly Fong-Jones <ellyjones@chromium.org>
Merge pull request #80 from elly/tlsdate-argvec

tlsdated: pass -l and -v through to tlsdate