Set release date for 2.9.4

Signed-off-by: Klaus Aehlig <aehlig@google.com>
Reviewed-by: Helga Velroyen <helgav@google.com>

NEWS

@@ -5,7 +5,7 @@ News
 Version 2.9.4
 -------------
 
-*(unreleased)*
+*(Released Mon, 10 Feb 2014)*
 
 - Fix the RAPI instances-multi-alloc call
 - assign unique filenames to file-based disks