fixed package-macosx-plugin in case top_srcdir != top_buildir and switched image format to UDBZ, too

NOTE that creating the plugin bundle is still horribly broken in the former case

A warning is issued. It allows a better interaction with GUI.
I also added abort() to non handled memory allocation error.

It will be used to create multiple video from one without having to fake
a video output (and all its overhead).

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

See http://forum.videolan.org/viewtopic.php?f=33&t=60477

Please find attached my attempt to port VLC to libmpcdec6.  Playing
and seeking works according to my tests with a bunch of files (both
SV7 and SV8).  I tried to follow upstream's coding style.
Signed-off-by: Christophe Mutricy <xtophe@videolan.org>

Compile x264 and live555 as PIC, as otherwise it causes linkage problems
on 64 bits

I also cleaned it up.

Signed off: Jean-Paul Saman <jpsaman@videolan.org>

Signed-off-by: Laurent Aimar <fenrir@videolan.org>