Add a non-tiny warning about CPUs that will silently desync.

Source/Core/Common/Src/ArmCPUDetect.cpp

@@ -279,3 +279,8 @@ std::string CPUInfo::Summarize()
 
 	return sum;
 }
+
+bool CPUInfo::IsUnsafe()
+{
+	return false;
+}

Source/Core/Common/Src/CPUDetect.h

@@ -77,6 +77,7 @@ struct CPUInfo
 
 	// Turn the cpu info into a string we can show
 	std::string Summarize();
+	bool IsUnsafe();
 
 private:
 	// Detects the various cpu features

Source/Core/Common/Src/x64CPUDetect.cpp

@@ -267,3 +267,8 @@ std::string CPUInfo::Summarize()
 	if (bLongMode) sum += ", 64-bit support";
 	return sum;
 }
+
+bool CPUInfo::IsUnsafe()
+{
+	return !bFlushToZero;
+}