repl: fix stack trace column number in strict mode

On strict mode, "'use strict'; void 0; " is added as prefix
in order to prevent "use strict" as the result value
for let/const statements. It causes wrong column number in
stack trace.

PR-URL: https://github.com/nodejs/node/pull/5416


Reviewed-By: Jeremiah Senkpiel <fishrock123@rocketmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>