cpu: Move host_tid field to CPUState

Change gdbstub's cpu_index() argument to CPUState now that CPUArchState
is no longer used.

Signed-off-by: Andreas Färber <afaerber@suse.de>

include/qom/cpu.h

@@ -65,6 +65,7 @@ struct kvm_run;
  * @nr_cores: Number of cores within this CPU package.
  * @nr_threads: Number of threads within this CPU.
  * @numa_node: NUMA node this CPU is belonging to.
+ * @host_tid: Host thread ID.
  * @created: Indicates whether the CPU thread has been successfully created.
  * @stop: Indicates a pending stop request.
  * @stopped: Indicates the CPU has been artificially stopped.
@@ -86,6 +87,7 @@ struct CPUState {
     HANDLE hThread;
 #endif
     int thread_id;
+    uint32_t host_tid;
     struct QemuCond *halt_cond;
     struct qemu_work_item *queued_work_first, *queued_work_last;
     bool thread_kicked;