git webkit setup pauses between questions to install modules

https://bugs.webkit.org/show_bug.cgi?id=240487
<rdar://93522052>

Reviewed by Alexey Proskuryakov.

* Tools/Scripts/libraries/webkitscmpy/webkitscmpy/program/setup.py:
(Setup.main): Pre-install jinja.

Canonical link: https://commits.webkit.org/250759@main
git-svn-id: https://svn.webkit.org/repository/webkit/trunk@294501 268f45cc-cd09-0410-ab3c-d52691b4dbfc

Tools/Scripts/libraries/webkitscmpy/webkitscmpy/program/setup.py

@@ -481,6 +481,8 @@ def parser(cls, parser, loggers=None):
 
     @classmethod
     def main(cls, args, repository, **kwargs):
+        import jinja2
+
         if isinstance(repository, local.Git):
             if 'true' != repository.config().get('webkitscmpy.setup', ''):
                 info_url = 'https://github.com/WebKit/WebKit/wiki/Git-Config#Configuration-Options'