Fix build with gettext 0.20.x

Upstream-Status: Pending
Signed-off-by: Khem Raj <raj.khem@gmail.com>

--- a/configure.ac
+++ b/configure.ac
@@ -49,7 +49,7 @@ AC_SUBST(all_libraries)
 dnl I18n support
 ALL_LINGUAS="it sk"
 AM_GNU_GETTEXT([external], need-ngettext)
-AM_INTL_SUBDIR
+#AM_INTL_SUBDIR
 
 dnl find resolver functions and the socket library on some broken OS
 AC_LBL_LIBRARY_NET