configure: replace pulse-simple with pulse

pulse-simple is additional library built on top of PulseAudio.
It causes ffmpeg to link to library which is not needed anymore.
This commit removes that redundant dependency.

Signed-off-by: Lukasz Marek <lukasz.m.luki2@gmail.com>
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>