configure: Remove AM_MAINTAINER_MODE
configure: Remove AM_MAINTAINER_MODE

Signed-off-by: Adam Jackson <4482611cc290c2ce1399431891dcb9221c95f994@redhat.com>

freedesktop-unofficial-mirror/xorg__lib__libXvMC,freedesktop-unofficial-mirror/xorg__lib__libXvMC,freedesktop-unofficial-mirror/xorg__lib__libXvMC