llvm: Reintroduce just the libstdc++ requirement from fec97cb
llvm: Reintroduce just the libstdc++ requirement from fec97cb

haikuports/haikuports,haikuports/haikuports,koletzky/haikuports,moochris/haikuports,Begasus/haikuports,haikuports/haikuports,miqlas/haikuports,miqlas/haikuports,nielx/haikuports,nielx/haikuports,Begasus/haikuports,nielx/haikuports,koletzky/haikuports,Begasus/haikuports,moochris/haikuports,Begasus/haikuports,koletzky/haikuports,haikuports/haikuports,moochris/haikuports,haikuports/haikuports,Begasus/haikuports,miqlas/haikuports