Bug#1050679: golang-github-twstrike-gotk3adapter: Unnecessary build dependency libgio-cil

[Bastian Germann]

Source: golang-github-twstrike-gotk3adapter
Severity: minor
Version: 0.0~git20170505.0.901a95d+ds-3.1

libgio-cil is a C# library and not even its development package.
There is no reason to have this in a go package so please drop it.