setup-hooks: Create .git hooks directory if necessary
setup-hooks: Create .git hooks directory if necessary

If for some reason the .git/hooks directory is removed or never created,
be sure to create the directory before trying to enter it.

Suggested-by: Michka Popoff <7b0496f66f66ee22a38826c310c38b415671b832@gmail.com>

kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix,kaspermarstal/SimpleElastix