Specify output file for curl commands in documentation

For downloading the commit-msg hook and the gerrit-cherry-pick script
users can either use scp or curl. Specify the output file for each curl
command so that the result is equal to the matching scp command.

Change-Id: Ie12f97842b2adad0c4d3f55ea9af3f1c1b933016
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

Documentation/cmd-cherry-pick.txt

@@ -39,7 +39,7 @@ copy it to your local system:
 ====
   $ scp -p -P 29418 john.doe@review.example.com:bin/gerrit-cherry-pick ~/bin/
 
-  $ curl http://review.example.com/tools/bin/gerrit-cherry-pick
+  $ curl -o ~/bin/gerrit-cherry-pick http://review.example.com/tools/bin/gerrit-cherry-pick
 ====
 
 GERRIT

Documentation/cmd-index.txt

@@ -12,8 +12,8 @@ To download a client command or hook, use scp or an http client:
   $ scp -p -P 29418 john.doe@review.example.com:bin/gerrit-cherry-pick ~/bin/
   $ scp -p -P 29418 john.doe@review.example.com:hooks/commit-msg .git/hooks/
 
-  $ curl http://review.example.com/tools/bin/gerrit-cherry-pick
-  $ curl http://review.example.com/tools/hooks/commit-msg
+  $ curl -o ~/bin/gerrit-cherry-pick http://review.example.com/tools/bin/gerrit-cherry-pick
+  $ curl -o .git/hooks/commit-msg http://review.example.com/tools/hooks/commit-msg
 
 For more details on how to determine the correct SSH port number,
 see link:user-upload.html#test_ssh[Testing Your SSH Connection].

Documentation/user-changeid.txt

@@ -50,7 +50,7 @@ To install the hook, copy it from Gerrit's daemon:
 
   $ scp -p -P 29418 john.doe@review.example.com:hooks/commit-msg .git/hooks/
 
-  $ curl http://review.example.com/tools/hooks/commit-msg
+  $ curl -o .git/hooks/commit-msg http://review.example.com/tools/hooks/commit-msg
 
 For more details, see link:cmd-hook-commit-msg.html[commit-msg].