Update.

Update.

	* math/libm-test.inc (lround_test): Add new test.
	(llround_test): Likewise.
	(lrint_test): Likewise.
	(llrint_test): Likewise.
	* sysdeps/ieee754/dbl-64/s_lround.c (__lround): Fix special case
	with result taking up 20 bits.
	* sysdeps/ieee754/dbl-64/s_lrint.c (__lrint): Likewise.
	* sysdeps/ieee754/dbl-64/s_llrint.c (__llrint): Likewise..
	* sysdeps/ieee754/ldbl-96/s_lroundl.c (__lroundl): Fix special
	case with result taking up 31 bits.
	* sysdeps/ieee754/ldbl-96/s_lrintl.c (__lrintl): Likewise.