libcanberra: do not enable systemd services by default, do not work.

srcpkgs/libcanberra/template

@@ -1,7 +1,7 @@
 # Template build file for 'libcanberra'.
 pkgname=libcanberra
 version=0.28
-revision=5
+revision=6
 distfiles="http://0pointer.de/lennart/projects/$pkgname/$pkgname-$version.tar.gz"
 build_style=gnu_configure
 configure_args="--localstatedir=/var --enable-alsa --enable-null
@@ -23,7 +23,6 @@ long_desc="
    3. libcanberra-gtk-module: a Gtk+ module that uses libcanberra-gtk to
       trigger input feedback event sounds"
 
-systemd_services="canberra-system-bootup.service"
 gconf_schemas="libcanberra.schemas"
 subpackages="$pkgname-devel"