klogcat: changed log directory

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
klogcat: cleanup

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
klogcat: cleanup when our job is done

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
klogcat: add post processing function

Signed-off-by: Fudong Bai <fudongbai@gmail.com>