selinux: When adding userdata labels, do cache too

Change-Id: I0c1ff737629474135767be7cfe2bfbea0513fa9e
diff --git a/prebuilt/common/etc/init.d/50selinuxrelabel b/prebuilt/common/etc/init.d/50selinuxrelabel
index be30775..bb66a4b 100644
--- a/prebuilt/common/etc/init.d/50selinuxrelabel
+++ b/prebuilt/common/etc/init.d/50selinuxrelabel
@@ -43,4 +43,7 @@
   $L "/data relabel starting..."
   restorecon -R /data
   $L "/data relabel complete"
+  $L "/cache relabel starting..."
+  restorecon -R /cache
+  $L "/cache relabel complete"
 fi