Add timestamp to network viewer

[thiagoftsm]

Summary

We are using inodes in our network viewer, but this value is accessed inside kernel with a lock, so we are adding a new variable to keep the pattern with the current kernel.

Test Plan

1. Clone this branch
2. Run the following commands:

# git submodule update --init --recursive
# make clean; make
# cd src/tests
# sh run_tests.sh

3. Verify that you do not have any libbpf error inside error.log.

Additional information

Linux Distribution	Environment	Kernel Version	Error	Success
Slackware Current	Bare metal	6.6.18	error.log	success.log