recovery: fix failure to unmount "/cache"

At load_locale_from_cache() function, LOCALE_FILE must get closed
after it is opened and used. Otherwise it causes a failure to
unmount "/cache" after load_locale_from_cache() function is called.

Change-Id: I9cec0f29a8ec4452c8a6a52e2f3c8ce9930d5372
Signed-off-by: Iliyan Malchev <malchev@google.com>