Add missing require(signals) to mediakeys.js
Add missing require(signals) to mediakeys.js

main.js was sometimes buili incorrectly because of this.

Issue: tiliado/nuvola-app-grooveshark#1

Signed-off-by: Jiří Janoušek <2a48236b6dcae98c8c0e90f4673742773ee17d91@gmail.com>

tiliado/nuvolaruntime,tiliado/nuvolaruntime,tiliado/nuvolaruntime,tiliado/nuvolaruntime