Hello,

This updates hurd and mach for core-packages-team branch to their latest available snapshots. The gnumach update fixes the build of gnumach-headers-boot0 (see https://issues.guix.gnu.org/77709).
I also changed everything to automake@1.17 and the regular texinfo. Should these be separate commits? Also should I separate the commencement.scm part from the hurd.scm part?

Please ignore the prerequisite patch-ids, these are part of WIP fixes for glibc/hurd and other packages to fix more things (again see #77709 for more info).

I hope I did the hashes in commencement.scm correctly, it was a bit tricky to download the sources with the ongoing savannah issues.

I have successfully built these with my WIP glibc patches and "-s i586-gnu" (ignoring some other test failures and adding -Wno-implicit-function-declaration in rumpkernel) and am currently waiting on the cross compiled variants.
Are there additional things that need testing for the 64bit hurd and are there other hurd specific packages that should be updated as well? 

Thanks.