core: Improve LPM support

* Larger last_kmsg buffer in the charger log for debugging.
 * Load /init.lpm.rc in order to externalize charger setup.
 * Add support for Samsung's LPM reset reason.

Conflicts:
        rootdir/init.rc

Change-Id: I66bde8f3ed0ae7dceeafb87339ad07964cfb3d46
init: fix indentation and tab

Change-Id: Ia832ab4df5d955b2fa2b791baf9444aca21c2571
init: provide initial pemissions for ondemand governor

Change-Id: Ic634a4c60a7efcb26e14955a1d525b2f206f76d1