Add SELinux filesystem relabeling to init

Since not all recoveries out there will support the OTA packages'
own labeling, check at boot if the system needs labels (and
apply them)

Change-Id: I58767977b90a78a12efe7bd9d713654eadf47e7a
Merge branch 'cm-10.1' into martincz
fix error path

Change-Id: Iffa0cbaa15064e0587f98e6f0885343df34a6629
Merge remote-tracking branch 'upstream/jb-mr1_mkt' into jb-mr1_mkt