MFH: r406816

devel/cgit: update 0.11.2 -> 0.12

Changes: http://lists.zx2c4.com/pipermail/cgit/2016-January/002817.html

PR: 206417
Submitted by: Kevin Zheng <kevinz5000@gmail.com> (maintainer)
Approved by: ports-secteam (miwi)
Security: CVE-2016-1899
Security: CVE-2016-1900
Security: CVE-2016-1901
Security: https://vuxml.FreeBSD.org/freebsd/62c0dbbd-bfce-11e5-b5fe-002590263bf5.html