astro/viking: Fix LIB_DEPENDS and unbreak port

• While here reset MAINTAINER: The port has been marked as broken since 2017-05-10 and the maintainer has a history of timeouts.

PR: 224668
Submitted by: Ting-Wei Lan <lantw44@gmail.com>
Approved by: koalative@gmail.com (maintainer timeout, 2 weeks)
MFH: 2018Q1