If the parent of current directory has an initialized repo,
for example, if the current directory is
'/home/users/harry/platform/ics', and there is an initialized repo
in harry's home directory '/home/users/harry/.repo', when user
run 'repo init' command, repo is always initialized to parent
directory in '/home/users/harry/.repo', but most of time user
intends to initialize repo in the current directory, this patch
tells user how to do it.
Change-Id: Id7a76fb18ec0af243432c29605140d60f3de85ca
75cc353380