contrib: tiger: fix autotools invocation

This patch fixes libtiger generation failure when automake complains about 'linking libtool libraries using a non-POSIX'

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>
avcodec: map Smacker audio

Sample:
http://samples.mplayerhq.hu/game-formats/smacker/wetlands/wetlogo.smk

Signed-off-by: Jean-Baptiste Kempf <jb@videolan.org>