Snippets for libdigidocpp 4.4.0 from Fedora ppc64le

Sourced from https://kojipkgs.fedoraproject.org/packages/libdigidocpp/4.4.0/2.fc45/data/logs/ppc64le/build.log.

• /builddir/build/BUILD/libdigidocpp-4.4.0-build/libdigidocpp-4.4.0/src/Signature.cpp:269:47: warning: ‘virtual digidoc::X509Cert digidoc::Signature::ArchiveTimeStampCertificate() const’ is deprecated [-Wdeprecated-declarations]
    269 |     if(auto cert = ArchiveTimeStampCertificate())
        |                    ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
  

• /builddir/build/BUILD/libdigidocpp-4.4.0-build/libdigidocpp-4.4.0/src/Signature.cpp:270:55: warning: ‘virtual std::string digidoc::Signature::ArchiveTimeStampTime() const’ is deprecated [-Wdeprecated-declarations]
    270 |         return {{std::move(cert), ArchiveTimeStampTime()}};
        |                                   ~~~~~~~~~~~~~~~~~~~~^~