[caribou] build: Note that we don't build when srcdir != builddir

[Colin Walters <walters src gnome org>]

commit d7505fc07b2eac0ca84b3ac16b72eaaebcad78ae
Author: Colin Walters <walters verbum org>
Date:   Thu Feb 9 16:17:59 2012 -0500

    build: Note that we don't build when srcdir != builddir

 configure.ac |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c1aab7f..5c0e0d1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -4,6 +4,9 @@ AC_INIT([caribou],
         [https://bugzilla.gnome.org/enter_bug.cgi?product=caribou],
         [caribou])
 
+# tools/make_schema.py looks for i18n.py in the srcdir
+echo \#buildapi-variable-no-builddir >/dev/null
+
 AC_CONFIG_MACRO_DIR([m4])
 
 AM_PROG_LIBTOOL