Pass sanitizer flags to swift on Unix-y systems
Pass sanitizer flags to swift on Unix-y systems

This patch fixes the part of the build system where we aren't passing
the sanitizer flags to swift, so the linker isn't linking against the
sanitizer libraries.

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