Sync libbpf

[thiagoftsm]

Summary

More details after tests....

Test Plan

1. Clone this branch and run:

# make clean; make tester

2. Get binaries from this link, and store inside a directory, for example, artifacts.
3. Extract them inside a directory:

$ for i in `ls *.zip`; do unzip $i; rm .gitkeep ; rm $i; done
$ for i in `ls *.xz`; do tar -xf $i; rm $i* ; done

4. Run the tests:

# for i in `seq 0 2`; do ./kernel/legacy_test --netdata-path ../artifacts/ --content --iteration --pid $i --log-path file_pid$i.txt; done

5. Verify that everything ran as expected:

# grep libbpf file_pid*
# grep Fail file_pid*

Additional information

This PR was tested on:

Distribution	Kernel	Real Parent	Parent	All PIDs
Slackware Current	5.19.17	slackware_pid0.txt	slackware_pid1.txt	slackware_pid2.txt
Arch Linux	6.0.12-arch1-1	arch_pid0.txt	arch_pid1.txt	arch_pid2.txt
Ubuntu 22.04	5.15.0-33-generic	ubuntu_5_15_pid0.txt	ubuntu_5_15_pid1.txt	ubuntu_5_15_pid2.txt
Alma 9	5.14.0-162.6.1.el9_1.x86_64	alma_5_14_pid0.txt	alma_5_14_pid1.txt	alma_5_14_pid2.txt
Debian	5.10.0-20-amd64	debian_pid0.txt	debian_pid1.txt	debian_pid2.txt
Oracle	5.4.17-2136.314.6.3.el8uek.x86_64	oracle_pid0.txt	oracle_pid1.txt	oracle_pid2.txt
Alma 8	4.18.0-425.3.1.el8.x86_64	Alma_4_18_pid0.txt	Alma_4_18_pid1.txt	Alma_4_18_pid2.txt
Ubuntu 18.04	4.15.0-180-generic	ubuntu_4_15_pid0.txt	ubuntu_4_15_pid1.txt	ubuntu_4_15_pid2.txt
Slackware current	4.14.290	slackware_4_14_0.txt	slackware_4_14_1.txt	slackware_4_14_2.txt
CentOS 7.9	3.10.0-1160.71.1.el7.x86_64.	centos_pid0.txt	centos_pid1.txt	centos_pid2.txt