test: all test_scripts should be part of tarball when building without libvirtd

Steps to reproduce this problem:
1. # ./autogen.sh --without-libvirtd
2. # make dist
3. # rpmbuild --nodeps --define "_sourcedir `pwd`" -ba libvirt.spec
   ...
   make  check-TESTS
   make[1]: Entering directory `/home/wency/rpmbuild/BUILD/libvirt-0.9.1/tests'
   make[1]: *** No rule to make target `test_conf.sh', needed by `check-TESTS'.  Stop.
   make[1]: Leaving directory `/home/wency/rpmbuild/BUILD/libvirt-0.9.1/tests'
   make: *** [check-am] Error 2
   error: Bad exit status from /var/tmp/rpm-tmp.7Rb9PV (%check)

tests/Makefile.am

@@ -144,6 +144,24 @@ test_scripts +=				\
 	virsh-optparse			\
 	virsh-schedinfo			\
 	virsh-synopsis
+else
+EXTRA_DIST += 				\
+	test_conf.sh			\
+	cpuset				\
+	daemon-conf			\
+	define-dev-segfault		\
+	int-overflow			\
+	libvirtd-fail			\
+	libvirtd-pool			\
+	read-bufsiz			\
+	read-non-seekable		\
+	start				\
+	undefine			\
+	vcpupin				\
+	virsh-all			\
+	virsh-optparse			\
+	virsh-schedinfo			\
+	virsh-synopsis
 endif
 
 if WITH_SECDRIVER_APPARMOR