Minor fix in swd_cmdq_append() - new queue elements are appended to the queue tail and queue pointer is not updated anyway because signle pointer is used as function parameter.
Minor fix in swd_cmdq_append() - new queue elements are appended to the queue tail and queue pointer is not updated anyway because signle pointer is used as function parameter.

ongjohn/LibSWD,cedar-renjun/LibSWD,ongjohn/LibSWD,shangdawei/LibSWD,cedar-renjun/LibSWD,ongjohn/LibSWD,cedar-renjun/LibSWD,shangdawei/LibSWD,shangdawei/LibSWD