sepolicy: allow vold to mount fuse-based sdcard

exfat and NTFS-3g requires access to /dev/fuse

Change-Id: I35b13ada586c8de3fbe04156c2d10bf5e3c07b3a
selinuxrelabel: Add a check for dalvik-cache

Change-Id: Ic8087450756ae81458e155aa1ca22d5055547664