m7-common: Enable ZSL

Change-Id: I8cb752fd419c2e4a949b1e6fdfcb4dd582f728e6
m7-common: Remove modem links, generate firmware symlinks

* Because remounting the system partition to symlink firmware is dumb.

Change-Id: I55b0ad232fb5dbb1abc57bcb2ace66be1737e7ca
m7-common: use shared msm8960 SELinux config

Change-Id: I0f2d55e7091288ce9ca6a26a27503b34cdda7b74
Revert "m7-common: use permissive SELinux"

This reverts commit 4977cd912ab02720baecf1a72ff275de1e2c5679.

Change-Id: Iee994def54044ae482b3557623b4e7b12d9df53e