xen.spec: Fix xenserver build failure.
This commit conducts similar operations as commit
2fd84d5e5
(rhel: Include pkgconfig and update header install in
Fedora/RHEL spec.) to xenserver spec file to prevent the
following rpmbuild failure.
RPM build errors:
Installed (but unpackaged) file(s) found:
/usr/include/openflow/nicira-ext.h
/usr/include/openflow/openflow-1.0.h
/usr/include/openflow/openflow-1.1.h
/usr/include/openflow/openflow-1.2.h
/usr/include/openflow/openflow-1.3.h
/usr/include/openflow/openflow-1.4.h
/usr/include/openflow/openflow-1.5.h
/usr/include/openflow/openflow-common.h
/usr/include/openflow/openflow.h
/usr/include/openvswitch/types.h
/usr/lib/pkgconfig/libofproto.pc
/usr/lib/pkgconfig/libopenvswitch.pc
/usr/lib/pkgconfig/libovsdb.pc
/usr/lib/pkgconfig/libsflow.pc
VMware-BZ: #
1362092
Reported-by: Edwin Chiu <echiu@nicira.com>
Signed-off-by: Alex Wang <alexw@nicira.com>
Acked-by: Gurucharan Shetty <gshetty@nicira.com>