This is https://github.com/loongson/glibc/tree/loongarch_2_36_upstream_v4,
rebased on glibc-2.35 tag and with non-code changes removed (1st and last
commits). Symbol versions are that of 2.36.

Also includes the following changes to make the libc exclusively use statx:

- https://sourceware.org/pipermail/libc-alpha/2022-May/138958.html
- https://github.com/loongson/glibc/pull/29

For experimental use only; this is not official nor frozen ABI.
