[AST/ASTMangler] Fix linker error for `SWIFT_BUILD_ONLY_SYNTAXPARSERLIB` build
[AST/ASTMangler] Fix linker error for `SWIFT_BUILD_ONLY_SYNTAXPARSERLIB` build

With such a build we avoid linking the `clangAST` library.

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