torch: use camera interface

Torch is running without privileges and don't have access to flashlight
sysfs. Make it use camera interface, so we don't need to open the access
to sysfs.

Change-Id: I56d03eafcb1d34a69d24d1dcd6e54b5c9d8d8c7d
init: cleanup panic and coredump

* We should not have two "write apanic_console", or the phone always hang
after a panic.
* Coredump doesn't exists.
* Copy last_kmsg to start of post-fs-data
* Lockup detector is disabled in kernel, remove.

Change-Id: Idd875c2f7450c4526eb80df645b8e0499607725a
Merge remote-tracking branch 'upstream/cm-10.2' into cm-10.2