Fix live555media libraries link order

Fix live555media libraries link order

Since at least vlc 1.0.2, compiling vlc with a static version of a
recent version of the live555media library (the version released on
2009/11/12 for instance) results in the following warning while loading
the liblive555_plugin.so module:

[0x1901090] main libvlc warning: cannot load module `/usr/local/lib/vlc/demux/liblive555_plugin.so' (/usr/local/lib/vlc/demux/liblive555_plugin.so: undefined symbol: _ZTI9HashTable)

This warning is due to an error in the link order of the
live555_plugin, fixed by the following patch.

Signed-off-by: Christophe Mutricy <xtophe@videolan.org>