score: Add capture data to tcb.
score: Move is_executing_on_a_core from cpuusagereport.c to threadimpl.h
cpuuse: Move is_executing_on_a_core to threadimpl.h
capture: Removal of capture task tracking.

This patch removes functionality for stack checking from
the capture engine and requiresi the use of existing rtems
functions for this information.  It modifies ctload to use
functionality similar to rtems cpuusage.  It removes the
capture task and stores a new capture task record the first
time the task is seen.  The per task data that was still
needed is scaled down and stored in the tcb.
capture01: Remove capture task tracking.

This involved adding a new variable record to the capture buffer
and modifing the trace method to read those records.
libmisc: Add top to cpuusage.
libmisc: Add top to shell.
capture: Remove ctload command.

rtems_cpu_usage_top should be used for this information.
top: Add new test.