Fixed RTXv5 mutex owner list handling.

The prev-pointer of the running threads mutex list was not set when multiple mutexes are acquired at a time. This leads to a corrupted list if the mutexes are not freed in reversed order.

Author: JonatanAntoni

CMSIS/RTOS2/RTX/Source/rtx_mutex.c

@@ -187,6 +187,9 @@ osStatus_t svcRtxMutexAcquire (osMutexId_t mutex_id, uint32_t timeout) {
     mutex->owner_thread = runnig_thread;
     mutex->owner_next   = runnig_thread->mutex_list;
     mutex->owner_prev   = NULL;
+    if (runnig_thread->mutex_list != NULL) {
+        runnig_thread->mutex_list->owner_prev = mutex;
+    }
     runnig_thread->mutex_list = mutex;
     mutex->lock = 1U;
     EvrRtxMutexAcquired(mutex, mutex->lock);