[gnome-software/gnome-3-20] trivial: Fix last commit to actually compile

[Richard Hughes <rhughes src gnome org>]

commit a27d827e7bc30c29d8f2b38fa5a57b6621c77220
Author: Richard Hughes <richard hughsie com>
Date:   Tue Sep 13 10:25:26 2016 +0100

    trivial: Fix last commit to actually compile

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 79cbaf2..db190a2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -67,6 +67,7 @@ PKG_CHECK_MODULES(JSON_GLIB, json-glib-1.0 >= 1.1.1)
 PKG_CHECK_MODULES(SQLITE, sqlite3)
 PKG_CHECK_MODULES(SOUP, libsoup-2.4 >= 2.51.92)
 PKG_CHECK_MODULES(GSETTINGS_DESKTOP_SCHEMAS, gsettings-desktop-schemas >= 3.11.5)
+PKG_CHECK_MODULES(LIBSECRET, libsecret-1)
 PKG_CHECK_MODULES(GNOME_DESKTOP, gnome-desktop-3.0 >= 3.17.92)
 AC_PATH_PROG(APPSTREAM_UTIL, [appstream-util], [unfound])
 AC_ARG_ENABLE(man,