scripts/make-release: install ldap and pam to fix isort instabilities

isort (triggered by scripts/whitespacecleanup.sh) needs to know which
modules are local and which are not, to separate them with a newline. If a
module cannot be found, it will be treated as local, apparently.

When ldap is not installed in the current environment, a difference was
created by isort in kallithea/bin/ldap_sync.py.

scripts/make-release

@@ -19,7 +19,7 b' virtualenv -p python2 "$venv"'
 . "$venv/bin/activate"
 
 echo "Install/verify tools needed for building and uploading stuff"
-pip install --upgrade -e . -r dev_requirements.txt twine
+pip install --upgrade -e . -r dev_requirements.txt twine python-ldap python-pam
 
 echo "Cleanup and update copyrights ... and clean checkout"
 scripts/run-all-cleanup