Fix /cache permissions for the dexopt cache

Change-Id: Ibbecac2b5a89d7fa7fb09c5be1d2bc3db766f885
Update tcp buffersize settings

Soem of these values are from CAF, some of these are
from various shipping devices, some are educated
guesses based on the properties of each connection.

In general, the higher the bandwidth-delay product
of a network, the larger the buffer needs to be.

Change-Id: Idd8cd27727b5e66bd3a46be5f9853380acbda8ba
run sysinit during boot

ported from CM7

Change-Id: I08f8e23d83ce45366ff2a994d110dd3431efa017