[PATCH v2 1/4] system_data_types.7: Add int_leastN_t family of types

[Paul Eggert]

On 10/1/20 7:35 AM, Alejandro Colomar via Libc-alpha wrote:
> +The narrowest signed integer type
> +of a width of at least N bits,

Motivation is missing here. Why is there an int_leastN_t type at all? Also, on 
all glibc platforms, int_leastN_t is equivalent to intN_t; this should probably 
be mentioned.

Similarly for int_fastN_t.