mount-encrypted: mount with commit=600

Mount with commit=600, just as the unencrypted stateful is mounted.

BUG=chrome-os-partner:13185
TEST=x86-alex build

Change-Id: I0cee85c8bdabccb6545ca2238f6d5a120300e3aa
Signed-off-by: Kees Cook <keescook@chromium.org>
Reviewed-on: https://gerrit.chromium.org/gerrit/31762
Commit-Ready: Luigi Semenzato <semenzato@chromium.org>
Reviewed-by: Luigi Semenzato <semenzato@chromium.org>
Tested-by: Luigi Semenzato <semenzato@chromium.org>
1 file changed