[ALPS03974446] modify vendor_init selinux policy

[Detail]
vendor_init will parse meta_init.rc to ifup lo,which needs some
selinux policy. when meta mode has enabled loopback, gps tool can
run normally

[Solution]
add selinux rule to up lo interface

MTK-Commit-Id: b351d14a284871dae0783f4d48278a1fde515f4d

Change-Id: I962bfc0002a76d34e5366869cb5fea46ae1453da
CR-Id: ALPS03974446
Feature: Location Chipset Capability