emulators/pipelight: 2.7.3 -> 2.8.1

Changes:
http://pipelight.net/cms/articles/2014-12/release-v0-2-8.html
and
https://bitbucket.org/mmueller2012/pipelight/raw/master/debian/changelog

PR: 197828
Submitted by: sasamotikomi@gmail.com
Reviewed by: philippe.r972@gmail.com