Updates the prefix order to properly decode crc32w.
Fixes the destination size codes for OP_crc32: the destination can never shrink to 16 bits. Resolves an old comment expressing confusion about this where the Intel manual had a separate entry for a data prefix, resulting in different codes than we need in our table.
Enables all the crc32w test cases in the binutils decenc tests. Updates the expected test patterns.
Fixes #2431 (closed)