score: Add capture data to tcb.

cpukit/score/include/rtems/score/thread.h

@@ -533,6 +533,11 @@ typedef struct {
 #endif
 } Thread_Scheduler_control;
 
+typedef struct  {
+  uint32_t      flags;
+  void *        control;
+}Thread_Capture_control;
+
 /**
  *  This structure defines the Thread Control Block (TCB).
  */
@@ -645,6 +650,8 @@ struct Thread_Control_struct {
    */
   Thread_Life_control                   Life;
 
+  Thread_Capture_control                Capture;
+
   /**
    * @brief Variable length array of user extension pointers.
    *

cpukit/score/src/threadinitialize.c

@@ -228,6 +228,9 @@ bool _Thread_Initialize(
   the_thread->Life.state = THREAD_LIFE_NORMAL;
   the_thread->Life.terminator = NULL;
 
+  the_thread->Capture.flags = 0;
+  the_thread->Capture.control = NULL;
+
   /*
    *  Open the object
    */