cmd/internal/obj/sparc64: add floating-point negate
cmd/internal/obj/sparc64: add floating-point negate

Change-Id: I01f46786a9860f8870caf16627679355407c2b3c

4ad/go,4ad/go,4ad/go,4ad/go,4ad/go,4ad/go,4ad/go,4ad/go