Update CoreClr, CoreFx, Standard, WCF to preview2-25608-02, preview2-25608-02, preview1-25608-01, preview2-25608-04, respectively (#2979)
Update CoreClr, CoreFx, Standard, WCF to preview2-25608-02, preview2-25608-02, preview1-25608-01, preview2-25608-04, respectively (#2979)


ericstj/core-setup,wtgodbe/core-setup,rakeshsinghranchi/core-setup,rakeshsinghranchi/core-setup,MichaelSimons/core-setup,wtgodbe/core-setup,crummel/dotnet_core-setup,MichaelSimons/core-setup,weshaggard/core-setup,weshaggard/core-setup,ericstj/core-setup,chcosta/core-setup,rakeshsinghranchi/core-setup,steveharter/core-setup,chcosta/core-setup,steveharter/core-setup,chcosta/core-setup,zamont/core-setup,zamont/core-setup,MichaelSimons/core-setup,wtgodbe/core-setup,weshaggard/core-setup,wtgodbe/core-setup,wtgodbe/core-setup,ericstj/core-setup,steveharter/core-setup,rakeshsinghranchi/core-setup,MichaelSimons/core-setup,zamont/core-setup,wtgodbe/core-setup,crummel/dotnet_core-setup,MichaelSimons/core-setup,MichaelSimons/core-setup,crummel/dotnet_core-setup,rakeshsinghranchi/core-setup,zamont/core-setup,weshaggard/core-setup,zamont/core-setup,steveharter/core-setup,rakeshsinghranchi/core-setup,zamont/core-setup,crummel/dotnet_core-setup,chcosta/core-setup,chcosta/core-setup,weshaggard/core-setup,ericstj/core-setup,crummel/dotnet_core-setup,chcosta/core-setup,weshaggard/core-setup,crummel/dotnet_core-setup,steveharter/core-setup,ericstj/core-setup,ericstj/core-setup,steveharter/core-setup