linux-user: Print tid not pid with strace This aligns with strace, and is very useful when tracing multi-threaded programs. The result is the same in single-threaded programs. Signed-off-by: J. Neuschäfer <j.neuschaefer@gmx.net> Message-Id: 20241024-strace-v1-1-56c4161431cd@gmx.net [rth: Use TaskState.ts_tid via get_task_state()] Signed-off-by: Richard Henderson <richard.henderson@linaro.org>