[gnome-software] Actually conditionally compile the Ubuntu reviews plugin

[Richard Hughes <rhughes src gnome org>]

commit 29c07aa5c2493df259bc004e31883e00af3eada5
Author: Richard Hughes <richard hughsie com>
Date:   Mon Mar 28 12:10:06 2016 +0100

    Actually conditionally compile the Ubuntu reviews plugin

 src/plugins/Makefile.am |    5 ++++-
 1 files changed, 4 insertions(+), 1 deletions(-)
---
diff --git a/src/plugins/Makefile.am b/src/plugins/Makefile.am
index 85a7f0d..d5b63b5 100644
--- a/src/plugins/Makefile.am
+++ b/src/plugins/Makefile.am
@@ -40,7 +40,6 @@ plugin_LTLIBRARIES =                                  \
        libgs_plugin_menu-spec-refine.la                \
        libgs_plugin_fedora_distro_upgrades.la          \
        libgs_plugin_provenance.la                      \
-       libgs_plugin_ubuntu-reviews.la                  \
        libgs_plugin_fedora_tagger_usage.la             \
        libgs_plugin_epiphany.la                        \
        libgs_plugin_icons.la
@@ -57,6 +56,10 @@ plugin_LTLIBRARIES +=                                        \
        libgs_plugin_packagekit.la
 endif
 
+if HAVE_UBUNTU_REVIEWS
+plugin_LTLIBRARIES += libgs_plugin_ubuntu-reviews.la
+endif
+
 if HAVE_SHELL_EXTENSIONS
 plugin_LTLIBRARIES += libgs_plugin_shell-extensions.la
 endif