Fixing levelization.sh script to ignore commented out includes

High Level Overview of Change

Issue raised in: https://github.com/XRPLF/rippled/issues/5193

Context of Change

Added simple check to ignore single-line comments during dependency analysis.

Type of Change

[ ] Bug fix (non-breaking change which fixes an issue)
[ ] New feature (non-breaking change which adds functionality)
[ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
[ ] Refactor (non-breaking change that only restructures code)
[ ] Performance (increase or change in throughput and/or latency)
[ ] Tests (you added tests for code that already exists, or your new feature included in this PR)
[ ] Documentation update
[x] Chore (no impact to binary, e.g. .gitignore, formatting, dropping support for older tooling)
[ ] Release

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 77.9%. Comparing base (838978b) to head (f1aa223).

Additional details and impacted files

[![Impacted file tree graph](https://app.codecov.io/gh/XRPLF/rippled/pull/5194/graphs/tree.svg?width=650&height=150&src=pr&token=i2RPGI5xGF&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=XRPLF)](https://app.codecov.io/gh/XRPLF/rippled/pull/5194?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=XRPLF) ```diff @@ Coverage Diff @@ ## develop #5194 +/- ## ========================================= - Coverage 77.9% 77.9% -0.0% ========================================= Files 782 782 Lines 66621 66620 -1 Branches 8161 8137 -24 ========================================= - Hits 51902 51896 -6 - Misses 14719 14724 +5 ``` [see 3 files with indirect coverage changes](https://app.codecov.io/gh/XRPLF/rippled/pull/5194/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=XRPLF) [![Impacted file tree graph](https://app.codecov.io/gh/XRPLF/rippled/pull/5194/graphs/tree.svg?width=650&height=150&src=pr&token=i2RPGI5xGF&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=XRPLF)](https://app.codecov.io/gh/XRPLF/rippled/pull/5194?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=XRPLF)

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XRPLF / rippled