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/lib/Makefile.am b/lib/Makefile.am
index 740dd0f..97f295e 100644
--- a/lib/Makefile.am
+++ b/lib/Makefile.am
@@ -29,7 +29,7 @@
 ##
 include $(top_srcdir)/config/eu.am
 AM_CFLAGS += -fpic
-INCLUDES += -I$(srcdir)/../libelf
+AM_CPPFLAGS += -I$(srcdir)/../libelf
 
 noinst_LIBRARIES = libeu.a