breakage with: [committed] libstdc++: Implement P2909R4 ("Dude, where's my char?") for C++20

[Hans-Peter Nilsson]

> From: Hans-Peter Nilsson <hp@axis.com>
> Date: Mon, 8 Jan 2024 17:24:35 +0100

> For some reason, this (r14-6990-g74a0dab18292be) breaks a
> build of (newlib targets) at least cris-elf and arm-eabi:

...aaand, just now fixed in r14-7007-geb846114ed7c49.
(Thanks!)

brgds, H-P