sepolicy: add device-specific sepolicies

Change-Id: Ia337b3448f20e8e77ea0c4d07a0d7090d7ba34f7
Merge remote-tracking branch 'cm/cm-12.0' into lp5.0
Revert "dlx: set selinux permissive for now"

This reverts commit 5a4dbe12a68e493d64b36de553c7c832a064157e.
dlx: update fstab

* mark boot and recovery for recoveryonly
* update deprecated prefix on usb storage

Change-Id: I3c03d3131916a6c123c1d668aa4dc387229fd75c
dlx: mount and firmware fixups

* create firmware symlinks at build time
* mount all partitions via fs_mgr

Change-Id: If50b4dce389455dc8ca668c93cb169f0afcb2707