configure: jack currently needs sem_timedwait()

Should fix ticket99 and ticket43 by disabling jack.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

configure

@@ -1459,7 +1459,7 @@ alsa_outdev_deps="alsa_asoundlib_h"
 bktr_indev_deps_any="dev_bktr_ioctl_bt848_h machine_ioctl_bt848_h dev_video_bktr_ioctl_bt848_h dev_ic_bt8xx_h"
 dv1394_indev_deps="dv1394 dv_demuxer"
 fbdev_indev_deps="linux_fb_h"
-jack_indev_deps="jack_jack_h"
+jack_indev_deps="jack_jack_h sem_timedwait"
 libdc1394_indev_deps="libdc1394"
 oss_indev_deps_any="soundcard_h sys_soundcard_h"
 oss_outdev_deps_any="soundcard_h sys_soundcard_h"
@@ -2975,7 +2975,7 @@ check_header soundcard.h
 
 enabled_any alsa_indev alsa_outdev && check_lib2 alsa/asoundlib.h snd_pcm_htimestamp -lasound
 
-enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack
+enabled jack_indev && check_lib2 jack/jack.h jack_client_open -ljack && check_func sem_timedwait
 
 enabled_any sndio_indev sndio_outdev && check_lib2 sndio.h sio_open -lsndio