Add syscalls needed for 7.22.0 version of system-probe

[brycekahle]

What does this PR do?

The new ebpf library we are using needs these additional syscalls. See DataDog/helm-charts#18 for corresponding update to the Helm chart.

Motivation

Without these syscalls, system-probe will CrashLoopBackoff.

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[codecov-commenter]

Codecov Report

Merging #135 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #135   +/-   ##
=======================================
  Coverage   58.90%   58.90%           
=======================================
  Files          31       31           
  Lines        4441     4441           
=======================================
  Hits         2616     2616           
  Misses       1633     1633           
  Partials      192      192           

Flag	Coverage Δ
#unittests	58.90% <ø> (ø)

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Impacted Files	Coverage Δ
pkg/controller/datadogagent/systemprobe.go	100.00% <ø> (ø)

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