teev-qt: fix build time dependencies & includes

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
teev-qt: build as a client player by default (for now)

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
teev-qt: don't try to getinfo() until after a successful media change

also fixes a hard hang symptom, but not the cause -

FIXME: libdvbtee_serve hangs if the 'info' API is called before
the 'tune' API returns.  It looks like a deadlock within the rbuf
mutex caused by calling check() during serve_client setup()

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>