[gegl] build/buildbot: Supress AM_PROG_LIBTOOL warning with autoconf 2.68

[Martin Nordholts <martinn src gnome org>]

commit e5707a05856f418a58acaece347cb19f04fc3ac9
Author: Martin Nordholts <martinn src gnome org>
Date:   Thu Sep 30 20:07:12 2010 +0200

    build/buildbot: Supress AM_PROG_LIBTOOL warning with autoconf 2.68

 build/buildbot/suppressed-warnings.txt |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/build/buildbot/suppressed-warnings.txt b/build/buildbot/suppressed-warnings.txt
index 249792c..cda64c1 100644
--- a/build/buildbot/suppressed-warnings.txt
+++ b/build/buildbot/suppressed-warnings.txt
@@ -6,3 +6,6 @@
 :    ^libtool: install: warning: relinking `.*'$
 :    ^libtool: install: warning: remember to run `libtool --finish .*_inst.*'$
 :    ^libtool: install: warning: `.*' has not been installed in `.*_inst.*'$
+
+# Comes from AM_PROG_LIBTOOL, not much we can do
+:    ^configure.ac:143: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body$