dev-perl/XML-LibXML: Bump to version 2.12.400

dev-perl/XML-LibXML: Bump to version 2.12.400

- EAPI6
- Cleanup tests

Upstream:
- Improved memory tests
- Undef warning removed.
- XML::LibXML::Test->attributes() returns an empty list in list context

Keywords:
- Keywords dropped due to unsatisfied dependencies previously unnoticed:
  ~amd64-fbsd ~arm64 ~s390 ~sh

Package-Manager: portage-2.2.28
RepoMan-Options: --ignore-arches --include-arches="alpha amd64 amd64-fbsd arm arm64 hppa ia64 m68k mips nios2 ppc ppc64 riscv s390 sh sparc sparc-fbsd x86 x86-fbsd"