git-codereview: pass args to installHook

This enables passing -v to
'git codereview hooks'
to see what commands are being run.

It also means that automatic installation of
hooks should respect -n.

Change-Id: I812685b43e9ea678641f64b2182b957342a4e43c
Reviewed-on: https://go-review.googlesource.com/24002
Reviewed-by: Andrew Gerrand <adg@golang.org>
3 files changed