Disable nightly opencl testing on os x
Disable nightly opencl testing on os x

My mac mini has flaky AMD drivers, and the CPU drivers only support
1D work groups.

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