Updates for Automake 1.13.

autoreconf will install config/test-driver, ignore it.
Update gettext m4 and po files to version 0.18.2.
Use AM_CPPFLAGS instead of INCLUDES.
All changes are backward compatible with Automake 1.11.
diff --git a/tests/ChangeLog b/tests/ChangeLog
index 2da85cf..2a065ee 100644
--- a/tests/ChangeLog
+++ b/tests/ChangeLog
@@ -1,3 +1,7 @@
+2013-04-24  Mark Wielaard  <mjw@redhat.com>
+
+	* Makefile.am: Use AM_CPPFLAGS instead of INCLUDES.
+
 2013-03-25  Mark Wielaard  <mjw@redhat.com>
 
 	* run-readelf-aranges.sh: New test.