fix recent Concise tests under PERL_UNICODE=''

Some smokers run with PERL_UNICODE set; this has the side effect of
making Concise display nextstate ops with open hints flags, e.g.

    nextstate(....) v:>,<,% ->8

where :... are the flags.

Concise 'golden samples' should have these flags set; they're stripped
from the expected output in the non-PERL_UNICODE case, rather than
being stripped from the actual output in the PERL_UNICODE case.

(It would probably make life easier if we did it the other way round.)