[m4-common] Update autoconf-archive

[Sébastien Wilmet <swilmet src gnome org>]

commit 9b1bc5c7723ce2a7938d8d95bfe5436e54995281
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun May 21 12:28:34 2017 +0200

    Update autoconf-archive

 autoconf-archive |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/autoconf-archive b/autoconf-archive
index e67ffbc..cfa14e9 160000
--- a/autoconf-archive
+++ b/autoconf-archive
@@ -1 +1 @@
-Subproject commit e67ffbceb156a2c33f7c689ff12cef89e8086242
+Subproject commit cfa14e9ac5d874abfc19e5d33eb7a1bbb9c4e899