scripts: create kernel configuration upgrade script

Create a script for automating kernel version changes.  This
generates a pair of commits which cause history to remain attached
to all versioned configuration files.

Signed-off-by: Elliott Mitchell <ehem+openwrt@m5p.com>

scripts/kernel_upgrade.pl

@@ -274,7 +274,7 @@ ()
 
 foreach my $name (@$list) {
 	next if($git->ls($start, "$name$to"));
-	my $new=$git->ls($start, "$name$from");
+	my $new=$git->ls('', "$name$from");
 	$git->putcmd("M $new->[0] $new->[1] $name$to");
 	$git->putcmd("D $name$from");
 }