Include autogen.sh in the tarfile.  See #306310.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@12983 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/Makefile.am b/Makefile.am
index 4d1f682..498463e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -105,7 +105,8 @@
 	NEWS.old \
 	valgrind.pc.in \
 	valgrind.spec.in \
-	valgrind.spec
+	valgrind.spec \
+	autogen.sh
 
 dist_noinst_SCRIPTS = \
 	vg-in-place