Haiku: Disable beosaudio for now, it's broken. We need -lnetwork.

git-svn-id: file:///var/local/repositories/ffmpeg/trunk@23567 9553f0bf-9b14-0410-a0b8-cfaf0461ba5b

configure

@@ -2127,7 +2127,8 @@ enabled spic && enable pic
 case $target_os in
     haiku)
         prefix_default="/boot/common"
-        enable audio_beos
+        disable audio_beos
+        network_extralibs="-lnetwork"
         ;;
     sunos)
         FFSERVERLDFLAGS=""