pull.sh: quote $upload_pack when passing it to git-fetch
pull.sh: quote $upload_pack when passing it to git-fetch

The previous code broke for example

  git pull --upload-pack 'echo --foo'

Reported-by: Joey Hess <87ea5dfc8b8e384d848979496e706390b497e547@joeyh.name>
Fix-suggested-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>
Signed-off-by: Matthieu Moy <d4d2cc2a6ec7b2aa587d4887cc5ed200f9b685a1@imag.fr>
Signed-off-by: Junio C Hamano <a6723cc3f76163bf7adb636a73ac3b0ceb3e6b9b@pobox.com>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git