[test] Change module in Oktalyzer loader test

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Fix sample loading in Oktalyzer loader

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>
Don't compile dead code in vorbis decoder

Signed-off-by: Claudio Matsuoka <cmatsuoka@gmail.com>