Update to version 3.18

PR:		195409
Submitted by:	maintainer


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@374728 35697150-7ecd-e111-bb59-0022644237b5
HTSlib is an implementation of a unified C library for accessing common file
formats, such as SAM, CRAM, VCF, and BCF, used for high-throughput sequencing
data. It is the core library used by samtools and bcftools.

WWW: http://www.htslib.org/

PR:		195591
Submitted by:	Reed A. Cartwright <cartwright@asu.edu>


git-svn-id: svn+ssh://svn.freebsd.org/ports/head@374729 35697150-7ecd-e111-bb59-0022644237b5