build: avoid stranded polkit file in client-only build

daemon/Makefile.am installs a .policy file if WITH_LIBVIRTD and
WITH_POLKIT are both set.  src/Makefile.am, on the other hand,
installs a .policy file if WITH_POLKIT1 is set, but without checking
WITH_LIBVIRTD.  When running 'make rpm' with client_only manually
set, on a Fedora 19 box, that leads to a failure:

RPM build errors:
    Installed (but unpackaged) file(s) found:
   /usr/share/polkit-1/actions/org.libvirt.api.policy

Fix it by adding another conditional.

* src/Makefile.am (polkitaction_DATA): Make conditional.
Signed-off-by: NEric Blake <eblake@redhat.com>

src/Makefile.am

@@ -1497,7 +1497,9 @@ if WITH_POLKIT1
 libvirt_driver_access_la_SOURCES += $(ACCESS_DRIVER_POLKIT_SOURCES)
 
 polkitactiondir = $(datadir)/polkit-1/actions
+if WITH_LIBVIRTD
 polkitaction_DATA = $(ACCESS_DRIVER_POLKIT_POLICY)
+endif WITH_LIBVIRTD
 
 $(ACCESS_DRIVER_POLKIT_POLICY): $(srcdir)/access/viraccessperm.h \
     $(srcdir)/access/genpolkit.pl Makefile.am