The functions aom_laplace_encode_special() and
 aom_laplace_decode_special() code the rest value as raw bits using the
 od_ec_enc_bits() and od_ec_dec_bits() functions.
These code bits in the reverse order as the aom_write_literal() and
 aom_read_literal() functions, so both the encoder and decoder must
 be changed at the same time.
This commit has no impact on metrics but is a bitstream change.

Change-Id: I428d5a83dd108c3a54f3c1dbae2c7fd5e59f5726