Create /data/lineage_updates to store updates

GmsCore deletes the files in /data/ota_package/, including the files
downloaded by Updater. Create a new directory where Updater can store
its files not to have them disappear randomly.

Change-Id: Ifdfbc7f81eb5f2c4370d02f0634c869fdbb848b4

prebuilt/common/etc/init.local.rc

@@ -22,6 +22,10 @@ on post-fs-data
     mkdir /data/ssh/empty 0600 root shell
     mkdir /cache/recovery 0770 system cache
 
+    # Create an additional OTA package directory that unlike /data/ota_package
+    # will not be touched by GmsCore.
+    mkdir /data/lineageos_updates 0770 system cache
+
     # Run sysinit
     start sysinit