add gofmt to the metalinter invocation
add gofmt to the metalinter invocation

Change-Id: I0edab1f217b8f33106172d590892a86489139b46
Reviewed-on: http://review.couchbase.org/75867
Reviewed-by: Marty Schoch <ba9951d7d66412e2a57aea395f01176a793cf5eb@gmail.com>
Tested-by: Marty Schoch <ba9951d7d66412e2a57aea395f01176a793cf5eb@gmail.com>

couchbaselabs/moss,steveyen/moss,steveyen/moss