x86: extend the scheduled bzImage symlinks removal

use of the bzImage symlinks in developer scripts is still widespread,
so lets extend the removal period by 2 years. These symlinks cost
us near nothing.
Signed-off-by: NIngo Molnar <mingo@elte.hu>

Documentation/feature-removal-schedule.txt

@@ -212,7 +212,7 @@ Who:    Stephen Hemminger <shemminger@linux-foundation.org>
 ---------------------------
 
 What:	i386/x86_64 bzImage symlinks
-When:	April 2008
+When:	April 2010
 
 Why:	The i386/x86_64 merge provides a symlink to the old bzImage
 	location so not yet updated user space tools, e.g. package