XMMS plugin : Fix symbol visibility.
XMMS plugin : Fix symbol visibility.

FLAC now defaults to building with -fvisibility=hidden on GCC4-ELF
platforms.  This breaks the XMMS plugin.  At least get_iplugin_info()
needs to be externally visible.

Patch from Christian Weisgerber <naddy@mips.inka.de>

fredericgermain/flac,waitman/flac,waitman/flac,fredericgermain/flac,waitman/flac,fredericgermain/flac,waitman/flac,waitman/flac,fredericgermain/flac