[gnome-control-center] m4: Add stub directory so gnome-autogen.sh doens't blow up

[Colin Walters <walters src gnome org>]

commit 5fe473db1c9af6c84fbdda698aaf806dbd6b7495
Author: Colin Walters <walters verbum org>
Date:   Fri Oct 8 15:46:10 2010 -0400

    m4: Add stub directory so gnome-autogen.sh doens't blow up
    
    It requires this directory.

 m4/empty |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/m4/empty b/m4/empty
new file mode 100644
index 0000000..e64632f
--- /dev/null
+++ b/m4/empty
@@ -0,0 +1 @@
+Empty file to keep stub m4 directory here.