Added an option to CMake build so that building of tests can be disabled.
Added an option to CMake build so that building of tests can be disabled.

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