[git-buildpackage] RFC: use of makedirs in export-dir making

[Andrea Zagli]

as the object

what do you think about using os.makedirs instead of os.mkdir in  
export-dir making?

https://github.com/agx/git-buildpackage/blob/c57df33c229510de04dd3742c36e55ab022acc52/gbp/scripts/buildpackage.py#L237

thanks in advance