Do not decorate php-fpm worker output
Do not decorate php-fpm worker output

By default, php-fpm will prefix output written to stdout/stderr with
something like "WARNING: [pool app] child 19 said into stdout: ...".
This breaks parsing JSON logs since the line is no longer valid JSON.

GoogleCloudPlatform/buildpacks,GoogleCloudPlatform/buildpacks,GoogleCloudPlatform/buildpacks,GoogleCloudPlatform/buildpacks