.mailmap: add canonical name for Eugene Syromyatnikov
.mailmap: add canonical name for Eugene Syromyatnikov

This is needed due to apparent deviation in spelling of commit author
name in several commits.

* .mailmap: Add canonical name for Eugene Syromyatnikov.

cuviper/strace,cuviper/strace,cuviper/strace,cuviper/strace,cuviper/strace