Update boost to 1.85.0

[mattwigway]

This updates Boost to 1.85.0 (the latest version). The currently packaged boost 1.79.0 is incompatible with gcc 12 (see boostorg/function#42).

NB: this also changes the download URL to boost.io from boostorg.jfrog.io. This appears to be the current official source linked from boost.org.

[mattwigway]

This is the relevant error from the mingw platforms. I'm not sure what to make of this, I guess it's not compiling a valid object? I'm not sure how to debug that.

[22:28:23] > windres --input res.rc --output res.o
[22:28:23] > /opt/bin/x86_64-linux-musl-cxx11/x86_64-linux-musl-g++ -DNDEBUG -Wl,res.o bindjam.cpp builtins.cpp class.cpp command.cpp compile.cpp constants.cpp cwd.cpp debug.cpp debugger.cpp execcmd.cpp execnt.cpp execunix.cpp filent.cpp filesys.cpp fileunix.cpp frames.cpp function.cpp glob.cpp hash.cpp hcache.cpp hdrmacro.cpp headers.cpp jam_strings.cpp jam.cpp jamgram.cpp lists.cpp make.cpp make1.cpp md5.cpp mem.cpp modules.cpp native.cpp option.cpp output.cpp parse.cpp pathnt.cpp pathsys.cpp pathunix.cpp regexp.cpp rules.cpp scan.cpp search.cpp startup.cpp tasks.cpp timestamp.cpp value.cpp variable.cpp w32_getreg.cpp mod_jam_builtin.cpp mod_jam_class.cpp mod_jam_errors.cpp mod_jam_modules.cpp mod_order.cpp mod_path.cpp mod_property_set.cpp mod_regex.cpp mod_sequence.cpp mod_set.cpp mod_string.cpp mod_summary.cpp mod_sysinfo.cpp mod_version.cpp -o b2
[22:28:51] res.o: file not recognized: File format not recognized

The PowerPC ones look like they might be an upstream issue. Boost.Charconv was introduced in Boost 1.85.0. The offending code is in a #else block that I suspect is only triggered on PowerPC, and has since been removed. conda-forge applied a patch to workaround; I'm working on doing the same.

[mattwigway]

PowerPC builds are now working, using the patch copied from conda-forge, itself pulled from the boost repository, but with file paths updated to apply to the boost source tarball.

[mattwigway]

The compile is working on Windows locally when I run julia build_tarballs.jl x86_64-w64-mingw32 --debug=error --verbose . I'll investigate more why it's not working here next week.