jf-common: dex-opt to cache

cache partition is 2gb, seriously, this is fine for us

Change-Id: I82be27c0bc5ea0f93b2ebd9b59f3e7dc0bd62006
jf: fix race condition at boot

Samsung's init is shit. Even Samsung knows this. So what they did was
limit the number of cpus that get to be used at boot. This helps prevent
a race condition leading to randomish boot hangs.

Need to bring these cores online later manually.

Change-Id: I3b2f2a7475977f81b1d538b0b9319b1e9e4f42f3