Don't embed non-ASCII literal into source code

This occasionally crashes on Windows. Use hex escapes instead.

Change-Id: I72024ea835ba60c846ecc9d89337688ed8d2861d
Reviewed-on: http://review.couchbase.org/28115
Tested-by: Mark Nunberg <mnunberg@haskalah.org>
Reviewed-by: Sergey Avseyev <sergey.avseyev@gmail.com>