Adds testsuites rtems examples.
Corrects workingttcp rtems Makefiles (trying to) bugfix the printf()
problem.

refs: #125176, #122803

	new file:   rtems_examples/testsuites/sptests/config.h
	new file:   rtems_examples/testsuites/sptests/spcontext01/Makefile-5
	new file:   rtems_examples/testsuites/sptests/spcontext01/init.c
	new file:   rtems_examples/testsuites/support
	modified:   rtems_examples/workingttcp/Makefile-5
	modified:   rtems_examples/workingttcp/ut/Makefile-5