Add emacs style line comment to several source files

Change-Id: Idc3e80655f6e122b1633a88b922336e5d3b42867
Reviewed-on: http://review.couchbase.org/29036
Reviewed-by: Filipe David Borba Manana <fdmanana@gmail.com>
Tested-by: Filipe David Borba Manana <fdmanana@gmail.com>