kernel/task_prctl.c : Fix typo
Fix typo : retruend to returned
* Returned Value:
* The returned value may depend on the specific commnand. For PR_SET_NAME
* and PR_GET_NAME, the returned value of 0 indicates successful operation.
- * On any failure, -1 is retruend and the errno value is set appropriately.
+ * On any failure, -1 is returned and the errno value is set appropriately.
*
* EINVAL The value of 'option' is not recognized.
* EFAULT optional arg1 is not a valid address.
