Fix selinux policy on RHEL 8

[dhurley]

Proposed changes

Updates made to selinux policy to fix the following error:

# sudo semodule -n -i /usr/share/selinux/packages/nginx_agent.pp
libsemanage.semanage_pipe_data: Child process /usr/libexec/selinux/hll/pp failed with code: 255. (No such file or directory).
nginx_agent: libsepol.policydb_read: policydb module version 21 does not match my version range 4-19
nginx_agent: libsepol.sepol_module_package_read: invalid module in module package (at section 0)
nginx_agent: Failed to read policy package
libsemanage.semanage_direct_commit: Failed to compile hll files into cil files.
 (No such file or directory).

Checklist

Before creating a PR, run through this checklist and mark each as complete.

• I have read the CONTRIBUTING document
• I have run make install-tools and have attached any dependency changes to this pull request
• If applicable, I have added tests that prove my fix is effective or that my feature works
• If applicable, I have checked that any relevant tests pass after adding my changes
• If applicable, I have updated any relevant documentation (README.md)
• If applicable, I have tested my cross-platform changes on Ubuntu 22, Redhat 8, SUSE 15 and FreeBSD 13