fix(php-fpm): honor LD_LIBRARY_PATH eatmydata expects

[sjinks]

eatmydata in Ubuntu is a bit broken: it sets the LD_LIBRARY_PATH environment variable to /usr/lib/libeatmydata:

   LD_LIBRARY_PATH=${LD_LIBRARY_PATH:+"$LD_LIBRARY_PATH:"}/usr/lib/libeatmydata
   LD_PRELOAD=${LD_PRELOAD:+"$LD_PRELOAD "}libeatmydata.so
   export LD_LIBRARY_PATH LD_PRELOAD

However, libeatmydata.so is located in a platform-dependent location, /usr/lib/$(uname -m)-linux-gnu.

This PR creates the /usr/lib/libeatmydata directory and symlinks all files matching /usr/lib/$(uname -m)-linux-gnu/libeatmydata.so* into it.

[github-actions]

Trivy Scan Report

ghcr.io/automattic/vip-container-images/php-fpm:8.1 (ubuntu 22.04)

No vulnerabilities found.

[github-actions]

Trivy Scan Report

ghcr.io/automattic/vip-container-images/php-fpm:8.2 (ubuntu 22.04)

No vulnerabilities found.

[github-actions]

Trivy Scan Report

ghcr.io/automattic/vip-container-images/php-fpm:8.3 (ubuntu 24.04)

No vulnerabilities found.