Update otter-browser to its november beta

Merge area51's revision 10747 which updates www/otter-browser to beta 3.

Approved by:		rakuco (mentor)
Differential Revision:	https://reviews.freebsd.org/D1259


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@374787 35697150-7ecd-e111-bb59-0022644237b5