Tzip : add protection code to prevent segment fault during powering off

Tzip : add protection code to prevent segment fault during powering off

Segment fault happend by fuse_handle. tzip_server_exit resets it during power off.
But it was being used by fuse_session_loop_mt at the time. So, applied below changes.
1. removed fuse_destroy and reset of fuse_handle in tzip_server_exit to do
   those actions in tzip_thread.
2. added pthread_jon to clean up used resources in tzip_thread

Change-Id: I81dfc74baf1bc8f86136ce0cf604b8915dcd62fe
Signed-off-by: lokilee73 <changjoo.lee@samsung.com>