Terminate the current running thread.
[[noreturn]] void zx_thread_exit(void);
zx_thread_exit() causes the currently running thread to cease running and exit.
The signal ZX_THREAD_TERMINATED will be asserted on the thread object upon exit and may be observed via zx_object_wait_one() or zx_object_wait_many() on a handle to the thread.
zx_thread_exit() does not return.