Unity games crash with TSO disabled due to the SPSC GfxDevice
ThreadedStreamBuffer read/write pointer updates missing acq/rel
semantics. Rather than attempting to use heuristics to match cases like
this, which could be overzealous and hit more accesses than necessary, just
target the problem directly as this is consist across 32/64 bit Unity versions
for at least the past 10 years. Gate this behind the existing Unity mono
hacks to avoid false-positives in non-Unity games.