This works around <https://issues.guix.gnu.org/54198>, whereby
cross-compilation from (say) x86_64-linux to i586-pc-gnu would produce a
broken Guile that crashes at startup.
* gnu/packages/patches/guile-cross-compilation.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/guile.scm (guile-3.0-latest)[source]: Use it.
