function setLowWord( x, low ) {
	return addon( x, low );
}
Sets the less significant 32 bits of a double-precision floating-point number.

@private
@param {number} x - double
@param {uinteger32} low - unsigned 32-bit integer to replace the lower order word of `x`
@returns {number} double having the same higher order word as `x`

@example
var low = 5 >>> 0; // => 00000000000000000000000000000101

var x = 3.14e201; // => 0 11010011100 01001000001011000011 10010011110010110101100010000010

var y = setLowWord( x, low ); // => 0 11010011100 01001000001011000011 00000000000000000000000000000101
// returns 3.139998651394392e+201

@example
var PINF = require( '@stdlib/constants/float64/pinf' );
var NINF = require( '@stdlib/constants/float64/ninf' );

var low = 12345678;

var y = setLowWord( PINF, low );
// returns NaN

y = setLowWord( NINF, low );
// returns NaN

y = setLowWord( NaN, low );
// returns NaN