Filter std::function call symbol
Filter std::function call symbol

The `std::function` symbol is showing up on centos 7. It should be okay.

xwu/swift,gregomni/swift,ahoppen/swift,glessard/swift,glessard/swift,JGiola/swift,xwu/swift,gregomni/swift,JGiola/swift,rudkx/swift,atrick/swift,atrick/swift,xwu/swift,JGiola/swift,ahoppen/swift,apple/swift,xwu/swift,xwu/swift,JGiola/swift,roambotics/swift,atrick/swift,xwu/swift,rudkx/swift,glessard/swift,apple/swift,gregomni/swift,glessard/swift,benlangmuir/swift,rudkx/swift,gregomni/swift,apple/swift,benlangmuir/swift,atrick/swift,atrick/swift,roambotics/swift,rudkx/swift,apple/swift,benlangmuir/swift,ahoppen/swift,JGiola/swift,JGiola/swift,ahoppen/swift,rudkx/swift,roambotics/swift,roambotics/swift,xwu/swift,benlangmuir/swift,glessard/swift,apple/swift,ahoppen/swift,roambotics/swift,gregomni/swift,atrick/swift,glessard/swift,benlangmuir/swift,ahoppen/swift,gregomni/swift,apple/swift,rudkx/swift,benlangmuir/swift,roambotics/swift