added support for maintainer mode


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@35 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/configure.in b/configure.in
index b8cd6cb..bf63543 100644
--- a/configure.in
+++ b/configure.in
@@ -3,6 +3,8 @@
 AM_CONFIG_HEADER(config.h)
 AM_INIT_AUTOMAKE(valgrind, 20020324)
 
+AM_MAINTAINER_MODE
+
 # Checks for programs.
 CFLAGS=""