chore(util) apply a fix to Test::Nginx as a patch

[thibaultcha]

The fix ensures that the --- shutdown_error_log check in the END block is skipped when no error.log was produced.

[codecov[bot]]

Codecov Report

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

Project coverage is 90.37921%. Comparing base (223a346) to head (ab4d9ab).

Additional details and impacted files

[](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/553?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) ```diff @@ Coverage Diff @@ ## main #553 +/- ## ============================================= Coverage 90.37921% 90.37921% ============================================= Files 47 47 Lines 10311 10311 ============================================= Hits 9319 9319 Misses 992 992 ``` [see 2 files with indirect coverage changes](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/553/indirect-changes?src=pr&el=tree-more&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | [Flag](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/553/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | Coverage Δ | | |---|---|---| | [unit](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/553/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | `90.13820% <ø> (-0.01105%)` | :arrow_down: | | [valgrind](https://app.codecov.io/gh/Kong/ngx_wasm_module/pull/553/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong) | `81.21406% <ø> (ø)` | | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Kong#carryforward-flags-in-the-pull-request-comment) to find out more.