vold: Honor mount options for ext4 mounts

Change-Id: Ie77e0d402c2c16d544251f7fdaeaad34d030d121
Merge "vold: Honor mount options for ext4 mounts" into cm-11.0
Merge branch 'cm-11.0' of github.com:CyanogenMod/android_system_vold into cm-11.0