"Undefine" LOOP.1.39 and LOOP.1.40

Following a heated discussion on #lisp, it seems that the test cases regarding values of iteration values in FINALLY clauses are incorrect. The spec contradicts itself in its wording and therefore we've come to a "conclusion" that it would be best to treat these values as undefined. Therefore it cannot be counted on that these tests are "correct" since they are testing undefined behaviour. It would therefore be preferable to note them as disabled.