[gnome-news] build: Use some AX_REQUIRE_DEFINED

[Michael Catanzaro <mcatanzaro src gnome org>]

commit d74e8ee81360caea29ecf419d50f264e87533b42
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Tue Dec 15 13:21:15 2015 -0600

    build: Use some AX_REQUIRE_DEFINED

 configure.ac |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 51ea1b3..b180a9b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,9 +22,11 @@ AC_DEFINE_UNQUOTED([GETTEXT_PACKAGE], ["$GETTEXT_PACKAGE"], [gettext package nam
 IT_PROG_INTLTOOL([0.50.2])
 
 # GSettings
+AX_REQUIRE_DEFINED([GLIB_GSETTINGS])
 GLIB_GSETTINGS
 
 # AppData
+AX_REQUIRE_DEFINED([APPSTREAM_XML])
 APPSTREAM_XML
 
 AC_CONFIG_FILES([