MFH: r435483

lang/chicken: update 4.11.0 -> 4.12.0

PR: 216661
Reported by: sevan
Submitted by: Vitaly Magerya <vmagerya@gmail.com> (maintainer)
Security: CVE-2016-6830
Security: CVE-2016-6831
Security: CVE-2016-9954
Security: https://vuxml.FreeBSD.org/freebsd/c6932dd4-eaff-11e6-9ac1-a4badb2f4699.html
Approved by: ports-secteam (with hat)