net-p2p/go-ethereum: upgrade to version 1.4.12

[jrm]

Summary

Upgrade to version 1.4.12

PR: 212917
Submitted by: [e-mail] (maintainer)

Test Plan

portlint -C: looks fine
testport: OK (poudriere: 9.3-RELEASE-p45, i386, default options) [1]
testport: OK (poudriere: 9.3-RELEASE-p45, amd64, default options) [2]
testport: OK (poudriere: 10.3-RELEASE-p7, i386, default options) [3]
testport: OK (poudriere: 10.3-RELEASE-p7, amd64, default options) [4]
testport: OK (poudriere: 11.0-RC3, i386, default options) [5]
testport: OK (poudriere: 11.0-RC3, amd64, default options) [6]

[1] http://pkg.awarnach.mathstat.dal.ca/data/9i386-default/2016-09-23_08h51m06s/logs/go-ethereum-1.4.12.log
[2] http://pkg.awarnach.mathstat.dal.ca/data/9amd64-default/2016-09-23_08h51m18s/logs/go-ethereum-1.4.12.log
[3] http://pkg.awarnach.mathstat.dal.ca/data/10i386-default/2016-09-23_08h51m28s/logs/go-ethereum-1.4.12.log
[4] http://pkg.awarnach.mathstat.dal.ca/data/10amd64-default/2016-09-23_08h51m35s/logs/go-ethereum-1.4.12.log
[5] http://pkg.awarnach.mathstat.dal.ca/data/11i386-default/2016-09-23_08h51m41s/logs/go-ethereum-1.4.12.log
[6] http://pkg.awarnach.mathstat.dal.ca/data/11amd64-default/2016-09-23_08h51m50s/logs/go-ethereum-1.4.12.log

[swills]

Approved