flacenc: include correct header

Encoder needs put_bits.h, not get_bits.h

Signed-off-by: Paul B Mahol <onemda@gmail.com>
dcaenc: remove unused header

Signed-off-by: Paul B Mahol <onemda@gmail.com>
ffv1enc: include correct header

Encoder needs put_bits.h, not get_bits.h

Signed-off-by: Paul B Mahol <onemda@gmail.com>
jpeglsenc: add missing put_bits.h header

Signed-off-by: Paul B Mahol <onemda@gmail.com>
adcpmenc: remove unused header

Signed-off-by: Paul B Mahol <onemda@gmail.com>