Fix /data_mirror permission

Test: Able to boot without error
Bug: 150671726

Merged-In: If366d284f4f01ebfa660e85bad57861c120ada7e
Change-Id: I9d85c00d191dcaa46c0182b5a15cd89dcdb9ea5e
(cherry picked from commit 1a5ae50943d84318cd01ec15099fac70c42e0824)
1 file changed