ukify: make the test happy with the latest OpenSSL

ukify: make the test happy with the latest OpenSSL

Which dropped some whitespaces in the output:

$ openssl version
OpenSSL 3.2.0 23 Nov 2023 (Library: OpenSSL 3.2.0 23 Nov 2023)
$ openssl x509 -in cert.pem -text -noout | grep Issuer
        Issuer: C=AU, ST=Some-State, O=Internet Widgits Pty Ltd

$ openssl version
OpenSSL 3.0.9 30 May 2023 (Library: OpenSSL 3.0.9 30 May 2023)
$ openssl x509 -in cert.pem -text -noout | grep Issuer
        Issuer: C = XX, L = Default City, O = Default Company Ltd

Making test-ukify unhappy:

>       assert 'Issuer: CN = SecureBoot signing key on host' in out
E       AssertionError: assert 'Issuer: CN = SecureBoot signing key on host' in '<...snip...>Issuer: CN=SecureBoot signing key on host archlinux2\n...'