[lldb] [Windows] Fix an incorrect assert in NativeRegisterContextWindows_arm

[mstorsjo]

Summary

This codepath hadn't been exercised in a build with asserts before.

[DavidSpickett]

LGTM

lldb/source/Plugins/Process/Windows/Common/NativeRegisterContextWindows_arm.cpp

 };
 
 enum { k_num_register_sets = 2 };
 
 } // namespace
 
 static RegisterInfoInterface *
 CreateRegisterInfoInterface(const ArchSpec &target_arch) {
-  assert((HostInfo::GetArchitecture().GetAddressByteSize() == 8) &&
-         "Register setting path assumes this is a 64-bit host");
+  assert((HostInfo::GetArchitecture().GetAddressByteSize() == 4) &&
+         "Register setting path assumes this is a 32-bit host");
   return new RegisterInfoPOSIX_arm(target_arch);
 }
 
 static Status GetThreadContextHelper(lldb::thread_t thread_handle,
                                      PCONTEXT context_ptr,
                                      const DWORD control_flag) {
   Log *log = ProcessWindowsLog::GetLogIfAny(WINDOWS_LOG_REGISTERS);
   Status error;