buildroot

libcdaudio: disable autoreconf

There's no stated purpose and it breaks with automake 1.12+
If it breaks in some scenario ping me, i've got a patch to fix the
autoreconf issue and re-enable it.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <jacmet@sunsite.dk>