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

[Martin Nordholts <martinn src gnome org>]

commit 5275270b36eb70a966f8e867b7dc92e15eafc909
Author: Martin Nordholts <martinn src gnome org>
Date:   Sun Oct 3 08:46:47 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 6189a4e..d2f5b0f 100644
--- a/build/buildbot/suppressed-warnings.txt
+++ b/build/buildbot/suppressed-warnings.txt
@@ -27,3 +27,6 @@
 # fixed properly
 :    <stdout>.* warning: .*yyunput.* defined but not used
 :    <stdout>.* warning: .*input.* defined but not used
+
+# Comes from AM_PROG_LIBTOOL, not much we can do
+:    ^configure.ac:157: warning: AC_LANG_CONFTEST: no AC_LANG_SOURCE call detected in body$