Hi

This updates libgpg-error; patch is intended against the core-updates
branch.  This is needed for GnuPG 2.4 and maybe other future packages.

I have tested this with 'guix build' and seeing there were some
cross-building magic in there, I also tested 'guix build
--target=mips64el-linux-gnu', and both works fine.  Building the current
GnuPG release with the new libgpg-error 1.46 also worked, which
presumable tests it quite extensively.  Any ideas on what more to test?

/Simon