new strings in at-spi

["Matthias Clasen" <matthias clasen gmail com>]

I've committed the fix for the blocker bug 535827 to at-spi.
Technically, this breaks the string freeze, since it adds a schemas
file which has two new translatable strings.
It should be a purely statistical problem though. The only place where
these strings ever show up is in gconf-editor.

Matthias