Add MLINKS for new bitset(9) APIs in r364796 / f8782001804f674dc3aff53053af5ebc3c199f02 and ae4a8e52072a87bfd49d553b9b14450c626269f8. Reported by: trasz Reviewed by: cem Sponsored by: Dell EMC Isilon Differential Revision: https://reviews.freebsd.org/D27944