function leCunNormal(args) {
	  return new LeCunNormal(args);
	}
LeCun normal initializer.

It draws samples from a truncated normal distribution centered on 0
with `stddev = sqrt(1 / fanIn)`
where `fanIn` is the number of input units in the weight tensor.

References:
  [Self-Normalizing Neural Networks](https://arxiv.org/abs/1706.02515)
  [Efficient Backprop](http://yann.lecun.com/exdb/publis/pdf/lecun-98b.pdf)

@doc {heading: 'Initializers', namespace: 'initializers'}