fn:round-half-to-even (at least 11 failures)

[Sorin Marian Nasoi]

there are at least 11 failures in "fn-round-half-to-even" test set:

"cbcl-round-half-to-even-001,cbcl-round-half-to-even-003,cbcl-round-half-to-even-005,cbcl-round-half-to-even-012,fn-round-half-to-even-30,fn-round-half-to-even-31,fn-round-half-to-even-32,fn-round-half-to-even-33,fn-round-half-to-even-34,fn-round-half-to-even-35,fn-round-half-to-even-9"