Build-require glibc-gconv-extra for ISO-8859-2 support in tests

glibc-2.33.9000-13 subpackaged a gconv module for ISO-8859-2 character
set. t/12html.t exhibits this character set and failed with:

    #   Failed test ' TODO : Add test name'
    #   at t/12html.t line 133.
    Wide character in print at /usr/share/perl5/vendor_perl/Test2/Formatter/TAP.pm line 125.
    #          got: 'ì¹èø'
    #     expected: 'ěščř'
    HTML parser error : Input is not proper UTF-8, indicate encoding !
	<p>���</p>

perl-XML-LibXML.spec

@@ -8,7 +8,7 @@ Name:           perl-XML-LibXML
 # it might not be needed anymore
 # this module is maintained, the other is not
 Version:        2.0207
-Release:        2%{?dist}
+Release:        3%{?dist}
 Epoch:          1
 Summary:        Perl interface to the libxml2 library
 License:        (GPL+ or Artistic) and MIT
@@ -52,6 +52,8 @@ BuildRequires:  perl(XML::SAX::DocumentLocator)
 BuildRequires:  perl(XML::SAX::Exception)
 BuildRequires:  perl(XSLoader)
 # Tests
+# t/12html.t exhibits ISO-8859-2 charset
+BuildRequires:  glibc-gconv-extra
 BuildRequires:  perl(Errno)
 BuildRequires:  perl(File::Spec)
 BuildRequires:  perl(lib)
@@ -104,6 +106,8 @@ validating XML parser and the high performance DOM implementation.
 %package tests
 Summary:        Tests for %{name}
 Requires:       %{name} = %{?epoch:%{epoch}:}%{version}-%{release}
+# t/12html.t exhibits ISO-8859-2 charset
+Requires:       glibc-gconv-extra
 Requires:       perl-Test-Harness
 %if %{with thread_test}
 Requires:       perl(threads)
@@ -183,6 +187,9 @@ fi
 %{_libexecdir}/%{name}
 
 %changelog
+* Fri Jun 25 2021 Petr Pisar <ppisar@redhat.com> - 1:2.0207-3
+- Build-require glibc-gconv-extra for ISO-8859-2 support in tests
+
 * Fri May 21 2021 Jitka Plesnikova <jplesnik@redhat.com> - 1:2.0207-2
 - Perl 5.34 rebuild