[cmake] Allow for host libraries to be object libraries by letting add_swift_host_library take an OBJECT parameter.
[cmake] Allow for host libraries to be object libraries by letting add_swift_host_library take an OBJECT parameter.

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