gas rejects -xarch=v9{,a} on Solaris/sparc

[Alexandre Oliva]

Since it supports -xarch=v8{,plus}{,a}, it would be nice if it also
supported -xarch=v9{,a}.

-- 
Alexandre Oliva http://www.ic.unicamp.br/~oliva IC-Unicamp, Bra[sz]il
oliva@{lsd.ic.unicamp.br,guarana.{org,com}} aoliva@{acm,computer}.org
oliva@{gnu.org,kaffe.org,{egcs,sourceware}.cygnus.com,samba.org}
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