lighttpd: Fix mod_wstunnel not being built in static build

[nalajcie]

WARN: only Makefile.in changed without Makefile.am to avoid necessary autogen run.

JIRA: DTR-460

Description

Motivation and Context

Types of changes

• 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 change)

How Has This Been Tested?

• Already covered by automatic testing.
• New test added: (add PR link here).
• Tested by hand on: imx6ull

Checklist:

• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing linter checks and tests passed.
• My changes generate no new compilation warnings for any of the targets.

Special treatment

• This PR needs additional PRs to work (list the PRs, preferably in merge-order).
• I will merge this PR by myself when appropriate.

[github-actions]

Unit Test Results

6 002 tests  +13   5 368 ✔️ +20   31m 41s ⏱️ + 1m 41s
   346 suites +13      634 💤  -   7 
       1 files   ±  0          0 ❌ ±  0 

Results for commit 058aab7. ± Comparison against base commit 09dea94.

[Darchiv]

Works fine as far as I have tested it