Fix handling of cmpxchg16b with lock prefix
Fix handling of cmpxchg16b with lock prefix

This was discovered when Frida's Stalker encountered the following
x86-64 instruction while tracing code in ntdll: `f0 49 0f c7 0a`.

techvoltage/capstone,07151129/capstone,sigma-random/capstone,nplanel/capstone,bigendiansmalls/capstone,zneak/capstone,pombredanne/capstone,capturePointer/capstone,NeilBryant/capstone,NeilBryant/capstone,AmesianX/capstone,sephiroth99/capstone,pranith/capstone,bughoho/capstone,pombredanne/capstone,pyq881120/capstone,bSr43/capstone,pranith/capstone,code4bones/capstone,code4bones/capstone,pranith/capstone,bowlofstew/capstone,zneak/capstone,zuloloxi/capstone,sephiroth99/capstone,zuloloxi/capstone,sephiroth99/capstone,dynm/capstone,techvoltage/capstone,dynm/capstone,bowlofstew/capstone,angelabier1/capstone,bughoho/capstone,bSr43/capstone,krytarowski/capstone,sigma-random/capstone,bughoho/capstone,AmesianX/capstone,angelabier1/capstone,bowlofstew/capstone,07151129/capstone,zneak/capstone,capturePointer/capstone,nplanel/capstone,krytarowski/capstone,angelabier1/capstone,pyq881120/capstone,pombredanne/capstone,dynm/capstone,sigma-random/capstone,code4bones/capstone,bigendiansmalls/capstone,angelabier1/capstone,sigma-random/capstone,nplanel/capstone,bowlofstew/capstone,code4bones/capstone,capturePointer/capstone,bughoho/capstone,nplanel/capstone,bigendiansmalls/capstone,sephiroth99/capstone,pombredanne/capstone,NeilBryant/capstone,bigendiansmalls/capstone,sephiroth99/capstone,pombredanne/capstone,bSr43/capstone,techvoltage/capstone,krytarowski/capstone,AmesianX/capstone,bigendiansmalls/capstone,zneak/capstone,sigma-random/capstone,zuloloxi/capstone,AmesianX/capstone,bSr43/capstone,krytarowski/capstone,pyq881120/capstone,angelabier1/capstone,07151129/capstone,bughoho/capstone,pyq881120/capstone,AmesianX/capstone,pombredanne/capstone,8l/capstone,NeilBryant/capstone,sigma-random/capstone,capturePointer/capstone,dynm/capstone,8l/capstone,bughoho/capstone,zuloloxi/capstone,angelabier1/capstone,8l/capstone,capturePointer/capstone,pyq881120/capstone,07151129/capstone,bughoho/capstone,zneak/capstone,pombredanne/capstone,bigendiansmalls/capstone,sigma-random/capstone,07151129/capstone,nplanel/capstone,8l/capstone,dynm/capstone,bSr43/capstone,capturePointer/capstone,zuloloxi/capstone,dynm/capstone,angelabier1/capstone,07151129/capstone,bSr43/capstone,pyq881120/capstone,zuloloxi/capstone,pranith/capstone,bigendiansmalls/capstone,krytarowski/capstone,zuloloxi/capstone,zneak/capstone,techvoltage/capstone,capturePointer/capstone,techvoltage/capstone,techvoltage/capstone,code4bones/capstone,pyq881120/capstone,nplanel/capstone,07151129/capstone,bowlofstew/capstone,NeilBryant/capstone,bSr43/capstone,techvoltage/capstone,zneak/capstone,AmesianX/capstone,8l/capstone,bowlofstew/capstone,NeilBryant/capstone,8l/capstone,code4bones/capstone,NeilBryant/capstone,nplanel/capstone,code4bones/capstone,krytarowski/capstone,dynm/capstone,pranith/capstone,sephiroth99/capstone,pranith/capstone,sephiroth99/capstone,krytarowski/capstone,8l/capstone,pranith/capstone,bowlofstew/capstone,AmesianX/capstone