Merge patch series "exports overhaul"

Rasmus Villemoes <ravi@prevas.dk> says:

This all started from me wondering "why does this standalone app end
up being so huge"? Oh, it essentially links in its own standard C
library to get strlen() and snprintf(). Which then led to asking "why
don't we export all those standard C functions when we have them
anyway?".

CI has chewed on these and seem happy - it was CI which told me about
the necessity of [1/9]: https://github.com/u-boot/u-boot/pull/813

Link: https://lore.kernel.org/r/20250919101002.568488-1-ravi@prevas.dk