Fix predicate name lookup for brr and bra instructions.

It was generating 0 for _all_ conditions for the 'brr' and 'bra' instructions.
This was because the 'pred' variable didn't contain a dot ('.') at the start,
but the lookup table for condition codes did, so the lookup failed.
Merge pull request #4 from chrisdiamand/master

Fix predicate name lookup for brr and bra instructions.