Be explicit about we are using find_package() in CONFIG mode to find LLVM in the CMake build system.
Be explicit about we are using find_package() in CONFIG mode to find
LLVM in the CMake build system.

fengzhyuan/Halide,damienfir/Halide,myrtleTree33/Halide,smxlong/Halide,aam/Halide,psuriana/Halide,delcypher/Halide,kgnk/Halide,kenkuang1213/Halide,ayanazmat/Halide,kenkuang1213/Halide,kgnk/Halide,mcanthony/Halide,dan-tull/Halide,tdenniston/Halide,ayanazmat/Halide,rodrigob/Halide,jiawen/Halide,rodrigob/Halide,rodrigob/Halide,delcypher/Halide,psuriana/Halide,ronen/Halide,myrtleTree33/Halide,damienfir/Halide,ayanazmat/Halide,kgnk/Halide,mcanthony/Halide,dougkwan/Halide,dougkwan/Halide,tdenniston/Halide,damienfir/Halide,rodrigob/Halide,delcypher/Halide,rodrigob/Halide,adasworks/Halide,damienfir/Halide,aam/Halide,fengzhyuan/Halide,tdenniston/Halide,kenkuang1213/Halide,aam/Halide,lglucin/Halide,smxlong/Halide,adasworks/Halide,ayanazmat/Halide,lglucin/Halide,ayanazmat/Halide,damienfir/Halide,adasworks/Halide,ronen/Halide,kenkuang1213/Halide,rodrigob/Halide,ronen/Halide,adasworks/Halide,kgnk/Halide,mcanthony/Halide,kenkuang1213/Halide,psuriana/Halide,ronen/Halide,dougkwan/Halide,myrtleTree33/Halide,jiawen/Halide,lglucin/Halide,jiawen/Halide,lglucin/Halide,damienfir/Halide,myrtleTree33/Halide,delcypher/Halide,jiawen/Halide,kenkuang1213/Halide,fengzhyuan/Halide,jiawen/Halide,psuriana/Halide,myrtleTree33/Halide,smxlong/Halide,tdenniston/Halide,tdenniston/Halide,ayanazmat/Halide,dougkwan/Halide,fengzhyuan/Halide,rodrigob/Halide,adasworks/Halide,ayanazmat/Halide,delcypher/Halide,delcypher/Halide,jiawen/Halide,ronen/Halide,tdenniston/Halide,smxlong/Halide,dougkwan/Halide,fengzhyuan/Halide,tdenniston/Halide,dan-tull/Halide,aam/Halide,mcanthony/Halide,lglucin/Halide,damienfir/Halide,lglucin/Halide,delcypher/Halide,mcanthony/Halide,damienfir/Halide,kgnk/Halide,fengzhyuan/Halide,adasworks/Halide,myrtleTree33/Halide,mcanthony/Halide,kgnk/Halide,dan-tull/Halide,kenkuang1213/Halide,smxlong/Halide,kgnk/Halide,rodrigob/Halide,ronen/Halide,dan-tull/Halide,psuriana/Halide,tdenniston/Halide,dan-tull/Halide,adasworks/Halide,kenkuang1213/Halide,psuriana/Halide,smxlong/Halide,smxlong/Halide,ronen/Halide,dan-tull/Halide,ayanazmat/Halide,mcanthony/Halide,aam/Halide,myrtleTree33/Halide,psuriana/Halide,dougkwan/Halide,dan-tull/Halide,delcypher/Halide,mcanthony/Halide,fengzhyuan/Halide,ronen/Halide,kgnk/Halide,jiawen/Halide,fengzhyuan/Halide,aam/Halide,dougkwan/Halide,aam/Halide,dan-tull/Halide,adasworks/Halide,myrtleTree33/Halide,lglucin/Halide,smxlong/Halide,dougkwan/Halide