xenserver: Don't include veth_mod.ko in RPMs.

veth_mod.ko is built only for Linux 2.6.18 (since later versions already
have it).  Our XenServer build doesn't use it at all, so don't package it.

(This is in response to a build failure against a XenServer 5.7.0
prerelease, which uses a 2.6.27 kernel and thus for which veth_mod.ko is
not built.)

xenserver/vswitch-xen.spec

@@ -84,6 +84,7 @@ rm -rf \
     $RPM_BUILD_ROOT/root/vswitch/bin/ovs-switchui \
     $RPM_BUILD_ROOT/root/vswitch/bin/ovs-wdt \
     $RPM_BUILD_ROOT/root/vswitch/bin/secchan \
+    $RPM_BUILD_ROOT/root/vswitch/kernel_modudules/veth_mod.ko \
     $RPM_BUILD_ROOT/root/vswitch/sbin/ovs-monitor \
     $RPM_BUILD_ROOT/root/vswitch/share/man/man8/ovs-controller.8 \
     $RPM_BUILD_ROOT/root/vswitch/share/man/man8/ovs-discover.8 \
@@ -287,7 +288,6 @@ fi
 /etc/profile.d/vswitch.sh
 /root/vswitch/kernel_modules/brcompat_mod.ko
 /root/vswitch/kernel_modules/openvswitch_mod.ko
-/root/vswitch/kernel_modules/veth_mod.ko
 /root/vswitch/scripts/dump-vif-details
 /root/vswitch/scripts/interface-reconfigure
 /root/vswitch/scripts/vif