run go fmt on goblas

Ran go fmt ./… on the repo and only this file was changed.  Longer term
it should be fixed with changes to the script which builds it, but that
script currently points to a referenceblas file which doesn’t exist,
and cblas had go fmt ran manually on it, so this seems like a
reasonable thing to do.
Merge pull request #17 from gonum/goblas-go-fmt

run go fmt on goblas

The change was trivial, so I guess there was no need for comments. If I'm jumping the gun then I apologize.