Move RHEL6 hacks to tools/fixup_stuff.sh

Change-Id: Ice983bc16379bc2bc25659c37cfc16b63fdfc34b
Copy policy_add() from Grenade functions

Change-Id: Ifd852e9d1ffe39fa23f6312d1ddf2874b5f2b9f0
Merge branch 'fixup-script' into dt-test
Merge branch 'policy-function' into dt-test