change kernel path to default one

Change-Id: I6ebb7542486c343d53f8875cd2feb6e7d4f72fc2
switch to ext4

Change-Id: Ica63dd712dd49cbc044c887974694d620507fe38
Enable richer SD card permissions.

Bug: 10330083
Change-Id: I3b1d64e212cb55034d0c884119707fe64a9f96c1
Merge tag 'android-4.4_r1' into kitkat-staging

Android 4.4 Release 1.0