merge ktapio into ktap tool

add a new export function to debugfs:
debugfs_get_dentry
for /sys/kernel/debug/ktap cannot remove if ktap tool
is reading (fix this in future)

check same_thread_group in tracing, this make ktap task
tracing event will not go through to user.
add os.smp_processor_id() function call
remove debug code
base function call speedup