vold: fix build.

Change-Id: If19cb8ccdbb8466e92480136b0d2a14d59847a2e
vold: Mount ext4/f2fs sdcards with sdcard_posix context

Change-Id: I05d9b57cc28ffd1f8deb8148d81c7f6fad0aa8db
Merge pull request #1 from CyanogenMod/cm-12.0

Merge