updated build to latest Gradle snapshot
updated build to latest Gradle snapshot

psideleau/spock,paplorinc/spock,Fuud/spock,sebi-hgdata/spock,GeeChao/spock,Fuud/spock,spockframework/spock,alien11689/spock,GeeChao/spock,sebi-hgdata/spock,alien11689/spock,psideleau/spock,paplorinc/spock,lokinell/spock,Fuud/spock,paplorinc/spock,lokinell/spock,sebi-hgdata/spock,lokinell/spock,psideleau/spock,Fuud/spock,siordache/spock,raphw/spock,siordache/spock,alien11689/spock,leonard84/spock,siordache/spock,GeeChao/spock,raphw/spock,raphw/spock