adds tracing to thread demo

this hardcodes the trace buffer

src/thread_demo/main.c

@@ -184,6 +184,9 @@ void tx_application_define(void* first_unused_memory)
 
     /* Release the block back to the pool.  */
     tx_block_release(pointer);
+
+    /* Enable tracing */
+    tx_trace_enable((void*)0x31000000, 0x100000, 256);
 }
 
 /* Define the test threads.  */