[ARM] Tasks stack class created

New taskinfo command added to the CLI. CLI stack size increased as it
was too short for the ls command (the CLI did hang!)

radio/src/cli.h

@@ -44,6 +44,9 @@ extern uint8_t cliTracesEnabled;
 #ifdef __cplusplus
 #include "fifo.h"
 extern Fifo<256> cliRxFifo;
+#include "tasks_arm.h"
+#define CLI_STACK_SIZE                 1000
+extern TaskStack<CLI_STACK_SIZE> cliStack;
 #endif
 
 void cliStart();