Temporarily disable the build on s390x

This should let us to get the boost rebuild done on other arches at
least.

libreoffice.spec

@@ -57,10 +57,12 @@ Summary:        Free Software Productivity Suite
 Name:           libreoffice
 Epoch:          1
 Version:        %{libo_version}.3
-Release:        1%{?libo_prerelease}%{?dist}
+Release:        2%{?libo_prerelease}%{?dist}
 License:        (MPLv1.1 or LGPLv3+) and LGPLv3 and LGPLv2+ and BSD and (MPLv1.1 or GPLv2 or LGPLv2 or Netscape) and Public Domain and ASL 2.0 and MPLv2.0 and CC0
 URL:            http://www.libreoffice.org/
 
+ExcludeArch:    s390x
+
 Source0:        %{source_url}/libreoffice-%{version}%{?libo_prerelease}%{?libo_buildfix}.tar.xz
 Source1:        %{source_url}/libreoffice-help-%{version}%{?libo_prerelease}%{?libo_buildfix}.tar.xz
 Source2:        %{source_url}/libreoffice-translations-%{version}%{?libo_prerelease}%{?libo_buildfix}.tar.xz
@@ -2195,6 +2197,9 @@ done
 %{_includedir}/LibreOfficeKit
 
 %changelog
+* Mon Jul 31 2017 Kalev Lember <klember@redhat.com> - 1:5.4.0.3-2
+- Temporarily disable the build on s390x
+
 * Wed Jul 26 2017 Fedora Release Engineering <releng@fedoraproject.org> - 1:5.4.0.3-1
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_27_Mass_Rebuild