This makes use of the new bug modeling to declare all platforms that
can use newlib and have no reentrancy hooks as affected by the
non-thread-safe stdio bug. (Which is every platform but ESP* and AVR,
the former because the reentrancy hooks are provided, the latter because
we do not and never will support newlib on them.)
Building on that, the mpaland-printf package is used when newlib is
used and the bug is present. This way we can rely on the stdio being
thread-safe on every platform and not causing random crashes at run
time.
Co-authored-by: mguetschow <mikolai.guetschow@tu-dresden.de>
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