int: add str2uXX_base macros as a way to convert numbers in other bases
int: add str2uXX_base macros as a way to convert numbers in other bases

Currently unused.

Signed-off-by: Josef 'Jeff' Sipek <a620f141433c70aa9e43778305a6c68cbfadfb25@josefsipek.net>

jeffpc/libjeffpc,jeffpc/libjeffpc,jeffpc/libjeffpc,jeffpc/libjeffpc