add lib/CMSIS_5 v5.7 locally

lib/CMSIS_5/CMSIS/RTOS2/RTX/Template/Thread.c

@@ -0,0 +1,27 @@
+#include "cmsis_os2.h"                          // CMSIS RTOS header file
+ 
+/*----------------------------------------------------------------------------
+ *      Thread 1 'Thread_Name': Sample thread
+ *---------------------------------------------------------------------------*/
+ 
+osThreadId_t tid_Thread;                        // thread id
+ 
+void Thread (void *argument);                   // thread function
+ 
+int Init_Thread (void) {
+ 
+  tid_Thread = osThreadNew(Thread, NULL, NULL);
+  if (tid_Thread == NULL) {
+    return(-1);
+  }
+ 
+  return(0);
+}
+ 
+void Thread (void *argument) {
+ 
+  while (1) {
+    ; // Insert thread code here...
+    osThreadYield();                            // suspend thread
+  }
+}