ports/116184: Update port: audio/gmpc to 0.15.1

[miwi at FreeBSD.org]

Synopsis: Update port: audio/gmpc to 0.15.1

Responsible-Changed-From-To: freebsd-ports-bugs->miwi
Responsible-Changed-By: miwi
Responsible-Changed-When: Sun Sep 9 07:50:54 UTC 2007
Responsible-Changed-Why: 
I'll take it.

http://www.freebsd.org/cgi/query-pr.cgi?pr=116184