Clean up to llvm command line options

[jonasbn]

• Cleaned up in the LLVM CLI flag handling
• Added ALL warning to llvm section

This is a follow up on PR #98

Description

Please include a summary of the proposed improvement or addressed issue.

Fixes/addresses (If applicable) # (issue)

Type of change

Please delete options that are not relevant.

• [X] New feature (non-breaking change which adds functionality)

Checklist:

• [X] My code follows the style guidelines of this project
• [X] I have performed a self-review of my own code
• [X] I have commented my code, particularly in hard-to-understand areas
• [X] My changes generate no new warnings
• [X] New and existing unit tests pass locally with my changes
• [X] Any dependent changes have been merged and published in downstream modules
• [X] Changes have been manually tested (please provide information on test platform using the fields below)

Test / Development Platform Information

• Operating system and version

Darwin silverrocket 21.4.0 Darwin Kernel Version 21.4.0: Fri Mar 18 00:46:32 PDT 2022; root:xnu-8020.101.4~15/RELEASE_ARM64_T6000 arm64

• Crypt::OpenSSL::X509 version

master branch

• Perl version

This is perl 5, version 34, subversion 0 (v5.34.0) built for darwin-2level

• OpenSSL version

OpenSSL 1.1.1n 15 Mar 2022

[jonasbn]

This has been included in the release 1.9.14-TRIAL, just uploaded to PAUSE/CPAN.