allow building with LLVM versions newer than 3.7
allow building with LLVM versions newer than 3.7

cmu-db/peloton,cmu-db/peloton,vittvolt/peloton,vittvolt/peloton,apavlo/peloton,seojungmin/peloton,apavlo/peloton,vittvolt/peloton,cmu-db/peloton,seojungmin/peloton,PauloAmora/peloton,PauloAmora/peloton,PauloAmora/peloton,cmu-db/peloton,seojungmin/peloton,malin1993ml/peloton,seojungmin/peloton,haojin2/peloton,haojin2/peloton,cmu-db/peloton,malin1993ml/peloton,malin1993ml/peloton,yingjunwu/peloton,seojungmin/peloton,PauloAmora/peloton,yingjunwu/peloton,PauloAmora/peloton,vittvolt/peloton,haojin2/peloton,apavlo/peloton,apavlo/peloton,yingjunwu/peloton,apavlo/peloton,yingjunwu/peloton,yingjunwu/peloton,vittvolt/peloton,PauloAmora/peloton,seojungmin/peloton,haojin2/peloton,haojin2/peloton,haojin2/peloton,malin1993ml/peloton,apavlo/peloton,cmu-db/peloton,malin1993ml/peloton,vittvolt/peloton,yingjunwu/peloton,malin1993ml/peloton