[babl] build: Don't complain about non-GNU make rules

[Mukund Sivaraman <muks src gnome org>]

commit 226dd1678b270ef375ad90c79caddf21d2aa26b9
Author: Mukund Sivaraman <muks banu com>
Date:   Tue Sep 13 00:50:21 2011 +0530

    build: Don't complain about non-GNU make rules

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 2688202..559e7ee 100644
--- a/configure.ac
+++ b/configure.ac
@@ -112,7 +112,7 @@ AC_SUBST(PACKAGE_NAME)
 
 dnl ==========================================================================
 
-AM_INIT_AUTOMAKE(no-define no-dist-gzip)
+AM_INIT_AUTOMAKE(no-define no-dist-gzip -Wno-portability)
 AM_CONFIG_HEADER(config.h)
 
 BABL_VARIADIC_MACROS