score: Set name before object is made public
score: Delete unused STATES_ALL_SET
score: _Debug_Is_thread_dispatching_allowed()

Do not check ISR level in _Debug_Is_thread_dispatching_allowed().
score: Delete _Thread_Internal_free()
score: Start thread dispatch profiling later

We are not interested in the sequential boot time.
librpc: Use POSIX key instead of task variables
posix: Prevent pthread_setspecific from returning EAGAIN.

The man-page for pthread_setspecific does not define the EAGAIN return value.
Further without this patch it was not possible to set keys that have been
already set a new value.

Add test for setting a new value to a already set key.
libcsupport: Remove unused gxx-wrapper function.

The rtems_gxx_key_dtor function is not longer used by gcc.
libcsupport: Use POSIX keys for GXX key functions

With this patch C++ applications now eventually need additional POSIX-keys and
POSIX-key-value-pairs configured.