Fix debuild config file

1 job for add/build in 1 minute and 36 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
failed #4001
package

00:01:36

 
Name Stage Failure
failed
package Build
-rw-rw-rw-. 1 root root   522 May 28 00:31 .gitlab-ci.yml
-rw-rw-rw-. 1 root root 18052 May 28 00:31 LICENSE
-rw-rw-rw-. 1 root root 712 May 28 00:31 Makefile
-rw-rw-rw-. 1 root root 52 May 28 00:31 README.md
drwxrwxrwx. 2 root root 4096 May 28 00:31 debian
drwxrwxrwx. 5 root root 4096 May 28 00:31 sources
$ ls -la ../$CI_PROJECT_DIR
ls: cannot access '..//builds/debian/nginx-package-build': No such file or directory
ERROR: Job failed: exit code 1