build: probes.d and libvirtd.stp should be part of tarball

Steps to reproduce this problem:
1. # ./autogen.sh --without-libvirtd
2. # make dist
3. # rpmbuild --nodeps --define "_sourcedir `pwd`" -ba libvirt.spec
   ...
   make[2]: Entering directory `/home/wency/rpmbuild/BUILD/libvirt-0.9.1/daemon'
   make[2]: *** No rule to make target `probes.d', needed by `probes.h'.  Stop.
   make[2]: Leaving directory `/home/wency/rpmbuild/BUILD/libvirt-0.9.1/daemon'
   make[1]: *** [all-recursive] Error 1
   make[1]: Leaving directory `/home/wency/rpmbuild/BUILD/libvirt-0.9.1'
   make: *** [all] Error 2
   error: Bad exit status from /var/tmp/rpm-tmp.WkAD7a (%build)

daemon/Makefile.am

@@ -165,8 +165,6 @@ libvirtd_CFLAGS += $(AVAHI_CFLAGS)
 libvirtd_LDADD += $(AVAHI_LIBS)
 endif
 
-EXTRA_DIST += probes.d libvirtd.stp
-
 if WITH_DTRACE
 libvirtd_LDADD += probes.o
 nodist_libvirtd_SOURCES = probes.h
@@ -349,6 +347,8 @@ uninstall-local:: uninstall-data-sasl
 endif # WITH_LIBVIRTD
 
 # This is needed for 'make dist' too, so can't wrap in WITH_LIBVIRTD.
+EXTRA_DIST += probes.d libvirtd.stp
+
 POD2MAN = pod2man -c "Virtualization Support" \
 			-r "$(PACKAGE)-$(VERSION)" -s 8