lavu: Add MD4 hashing

Signed-off-by: James Almer <jamrial@gmail.com>
lavu/hash: Add support for MD4

Signed-off-by: James Almer <jamrial@gmail.com>
lavu: Add CRC64 hashing

Signed-off-by: James Almer <jamrial@gmail.com>
lavu/hash: Add support for CRC64

Signed-off-by: James Almer <jamrial@gmail.com>