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Lots of recent picolibc news:

* Oliver Stannard at ARM got testing running on the FVP emulator for more rigorous AARCH64 validation.

* Eduard Tanase fixed a bunch of documentation issues.

* Joel Holdsworth added OpenRisc support.

* Jiaxun Yang fixed my janky tools situation by creating picolibc-ci-tools which auto-builds all of the extra bits we need for CI. They also add LoongArch and LatticeMico32 support. The latter uncovered GCC bugs which I had fun fixing.

Thanks to all of you!