Parrot::Configure::add_steps():  Modify so that instead of assigning the list of new steps en masse to the list_of_steps attribute, push them individually onto the array which is the value of that attribute -- thereby averting wiping out any steps which are already present in that attribute.  This should have no impact on its use in Configure.pl, but should help in testing situations where we want to precisely control which steps are in list_of_steps at any given time.
Parrot::Configure::add_steps():  Modify so that instead of assigning the list
of new steps en masse to the list_of_steps attribute, push them individually
onto the array which is the value of that attribute -- thereby averting wiping
out any steps which are already present in that attribute.  This should have
no impact on its use in Configure.pl, but should help in testing situations
where we want to precisely control which steps are in list_of_steps at any
given time.


git-svn-id: 6e74a02f85675cec270f5d931b0f6998666294a3@25756 d31e2699-5ff4-0310-a27c-f18f2fbe73fe

ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot,ashgti/parrot