p350: move system dalvik-cache to /cache

we will get more free internal storage as the total internal
storage is 190M only.

But simplely remove the "dalvik.vm.dexopt-data-only=1" line
in system.prop will result in stuck on tux logo problem.

Because after power up, system_server found /cache/dalvik-cache
directory is missing, then failed to create dalvik-cache, which
cause to stuck problem.

So we need an extra script to create these missing directory.

Change-Id: I8383d588837e77b3b79f54e7a6bde63f9b2189d4