ClangImporter: adjust for SVN r345637
ClangImporter: adjust for SVN r345637

`ObjC1` has been removed from clang.  Use `ObjC` to detect if Objective-C
language support is enabled.

ahoppen/swift,ahoppen/swift,lorentey/swift,sschiau/swift,devincoughlin/swift,sschiau/swift,nathawes/swift,apple/swift,gribozavr/swift,devincoughlin/swift,lorentey/swift,jckarter/swift,aschwaighofer/swift,tkremenek/swift,sschiau/swift,CodaFi/swift,benlangmuir/swift,jmgc/swift,aschwaighofer/swift,jckarter/swift,benlangmuir/swift,sschiau/swift,hooman/swift,tkremenek/swift,jckarter/swift,glessard/swift,tkremenek/swift,gregomni/swift,devincoughlin/swift,roambotics/swift,roambotics/swift,allevato/swift,rudkx/swift,CodaFi/swift,gribozavr/swift,stephentyrone/swift,jmgc/swift,parkera/swift,lorentey/swift,glessard/swift,stephentyrone/swift,CodaFi/swift,JGiola/swift,apple/swift,stephentyrone/swift,allevato/swift,lorentey/swift,airspeedswift/swift,hooman/swift,airspeedswift/swift,devincoughlin/swift,nathawes/swift,tkremenek/swift,stephentyrone/swift,glessard/swift,glessard/swift,jckarter/swift,tkremenek/swift,devincoughlin/swift,harlanhaskins/swift,devincoughlin/swift,JGiola/swift,harlanhaskins/swift,parkera/swift,jckarter/swift,parkera/swift,xwu/swift,stephentyrone/swift,nathawes/swift,jmgc/swift,rudkx/swift,gregomni/swift,stephentyrone/swift,benlangmuir/swift,aschwaighofer/swift,karwa/swift,airspeedswift/swift,hooman/swift,devincoughlin/swift,gregomni/swift,roambotics/swift,apple/swift,JGiola/swift,devincoughlin/swift,CodaFi/swift,harlanhaskins/swift,sschiau/swift,nathawes/swift,nathawes/swift,hooman/swift,karwa/swift,allevato/swift,xwu/swift,lorentey/swift,ahoppen/swift,sschiau/swift,xwu/swift,apple/swift,apple/swift,rudkx/swift,benlangmuir/swift,karwa/swift,harlanhaskins/swift,gregomni/swift,tkremenek/swift,CodaFi/swift,airspeedswift/swift,apple/swift,gregomni/swift,karwa/swift,parkera/swift,jmgc/swift,karwa/swift,gregomni/swift,jckarter/swift,stephentyrone/swift,allevato/swift,atrick/swift,atrick/swift,airspeedswift/swift,benlangmuir/swift,JGiola/swift,hooman/swift,harlanhaskins/swift,JGiola/swift,jmgc/swift,karwa/swift,aschwaighofer/swift,gribozavr/swift,CodaFi/swift,xwu/swift,benlangmuir/swift,karwa/swift,lorentey/swift,glessard/swift,roambotics/swift,rudkx/swift,parkera/swift,lorentey/swift,jckarter/swift,gribozavr/swift,xwu/swift,karwa/swift,allevato/swift,harlanhaskins/swift,gribozavr/swift,parkera/swift,gribozavr/swift,sschiau/swift,xwu/swift,atrick/swift,harlanhaskins/swift,sschiau/swift,parkera/swift,ahoppen/swift,jmgc/swift,roambotics/swift,JGiola/swift,jmgc/swift,nathawes/swift,hooman/swift,hooman/swift,ahoppen/swift,xwu/swift,CodaFi/swift,allevato/swift,rudkx/swift,parkera/swift,atrick/swift,aschwaighofer/swift,airspeedswift/swift,airspeedswift/swift,aschwaighofer/swift,aschwaighofer/swift,tkremenek/swift,gribozavr/swift,atrick/swift,glessard/swift,atrick/swift,gribozavr/swift,allevato/swift,nathawes/swift,roambotics/swift,ahoppen/swift,rudkx/swift,lorentey/swift