RC: fix custom boot animation

The custom boot animation had a race condition that ended up
changing the path to always be the system boot animation. Using
a local version of the path and setting it during the pre-execute
stage solves the race.

Change-Id: I341a131d05a748dfdc1205e488ba19fcc8d1a46a
new bootanimation (2/2)

Change-Id: I682e8e050ccaf9c7182f9a1689db1db9e6fe904a
Signed-off-by: Roman Birg <romanbirg@gmail.com>