cpu.x86.bootstrap: use TEST instruction
cpu.x86.bootstrap: use TEST instruction

nicolas-p/factor,mrjbq7/factor,factor/factor,bpollack/factor,tgunr/factor,tgunr/factor,dch/factor,AlexIljin/factor,AlexIljin/factor,AlexIljin/factor,sarvex/factor-lang,mrjbq7/factor,bjourne/factor,bjourne/factor,slavapestov/factor,factor/factor,mrjbq7/factor,bpollack/factor,bpollack/factor,nicolas-p/factor,AlexIljin/factor,tgunr/factor,nicolas-p/factor,slavapestov/factor,factor/factor,bpollack/factor,slavapestov/factor,factor/factor,bjourne/factor,mrjbq7/factor,mrjbq7/factor,slavapestov/factor,dch/factor,dch/factor,sarvex/factor-lang,sarvex/factor-lang,nicolas-p/factor,dch/factor,tgunr/factor,mrjbq7/factor,bpollack/factor,factor/factor,slavapestov/factor,slavapestov/factor,bjourne/factor,bjourne/factor,bpollack/factor,tgunr/factor,sarvex/factor-lang,bpollack/factor,dch/factor,dch/factor,nicolas-p/factor,nicolas-p/factor,slavapestov/factor,AlexIljin/factor,sarvex/factor-lang,bjourne/factor,bjourne/factor,AlexIljin/factor,AlexIljin/factor,nicolas-p/factor,sarvex/factor-lang,tgunr/factor,factor/factor,sarvex/factor-lang