klogcat: set timezone before get log

for a list of timezones, go to:
http://en.wikipedia.org/wiki/List_of_tz_database_time_zones

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
klogcat: pack all the log file

Signed-off-by: Fudong Bai <fudongbai@gmail.com>
klogcat: mkdir add -p option

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