fusion3: set selinux permissive

Change-Id: I16d2adea4a111c954b13cb95cb05e588c623cfe5
fusion3: fix mkbootimg path

On some rare occations, mkbootimg will not be in path. We have the full
path in $(MKBOOTIMG), so let's use that instead.

Change-Id: Ibe5242844f64c1e3d097f9a326eeb5c4ee02ee60
Merge branch 'cm-11.0' into martincz