* Makefile.am, configure.ac: Add sp60 to exercise case where a task is
blocked on one period while another expires. Add sp61 which exercises
the case where a call is made to rtems_shutdown_executive when the
system is not up.
* sp60/.cvsignore, sp60/Makefile.am, sp60/init.c, sp60/sp60.doc,
sp60/sp60.scn, sp61/.cvsignore, sp61/Makefile.am, sp61/init.c,
sp61/sp61.doc, sp61/sp61.scn: New files.
