Fix --nocheck build

Thanks to a patch from Mark Salter <msalter@redhat.com>

libxml2.spec

@@ -1,7 +1,7 @@
 Summary: Library providing XML and HTML support
 Name: libxml2
 Version: 2.9.0
-Release: 3%{?dist}%{?extra_release}
+Release: 4%{?dist}%{?extra_release}
 License: MIT
 Group: Development/Libraries
 Source: ftp://xmlsoft.org/libxml2/libxml2-%{version}.tar.gz
@@ -84,16 +84,16 @@ make install DESTDIR=%{buildroot}
 # multiarch crazyness on timestamp differences or Makefile/binaries for examples
 touch -m --reference=$RPM_BUILD_ROOT/%{_includedir}/libxml2/libxml/parser.h $RPM_BUILD_ROOT/%{_bindir}/xml2-config
 
-%check
-make check
-
 rm -f $RPM_BUILD_ROOT%{_libdir}/*.la
 rm -f $RPM_BUILD_ROOT%{_libdir}/python*/site-packages/*.a
 rm -f $RPM_BUILD_ROOT%{_libdir}/python*/site-packages/*.la
 rm -rf $RPM_BUILD_ROOT%{_datadir}/doc/libxml2-%{version}/*
 rm -rf $RPM_BUILD_ROOT%{_datadir}/doc/libxml2-python-%{version}/*
 (cd doc/examples ; make clean ; rm -rf .deps Makefile)
-gzip -9 doc/libxml2-api.xml
+gzip -9 -c doc/libxml2-api.xml > doc/libxml2-api.xml.gz
+
+%check
+make runtests
 
 %clean
 rm -fr %{buildroot}
@@ -153,6 +153,9 @@ rm -fr %{buildroot}
 %doc doc/python.html
 
 %changelog
+* Mon Feb 11 2013 Daniel Veillard <veillard@redhat.com> - 2.9.0-4
+- fix --nocheck build which I broke in october rhbz#909767
+
 * Mon Nov 19 2012 Jaroslav Reznik <jreznik@redhat.com> - 2.9.0-3
 - workaround for crc/len check failure, rhbz#877567