Migrate git-repo to create private changes rather than drafts

Considering that some users might expect changes created with
'-d' option are not public. Private changes may be a better
choice here than work-in-progress changes.

Change-Id: I46a8fb9ae38beb41cf96d6abe82bea6db2439669
diff --git a/subcmds/upload.py b/subcmds/upload.py
index 61b18bc..f40ac9d 100644
--- a/subcmds/upload.py
+++ b/subcmds/upload.py
@@ -152,8 +152,8 @@
                  dest='current_branch', action='store_true',
                  help='Upload current git branch.')
     p.add_option('-d', '--draft',
-                 action='store_true', dest='draft', default=False,
-                 help='If specified, upload as a draft.')
+                 action='store_true', dest='private', default=False,
+                 help='(Deprecated). If specified, upload as a private change.')
     p.add_option('-p', '--private',
                  action='store_true', dest='private', default=False,
                  help='If specified, upload as a private change.')
@@ -205,7 +205,7 @@
 
       destination = opt.dest_branch or project.dest_branch or project.revisionExpr
       print('Upload project %s/ to remote branch %s%s:' %
-            (project.relpath, destination, ' (draft)' if opt.draft else ''))
+            (project.relpath, destination, ' (private)' if opt.private else ''))
       print('  branch %s (%2d commit%s, %s):' % (
                     name,
                     len(commit_list),
@@ -386,7 +386,6 @@
 
         branch.UploadForReview(people,
                                auto_topic=opt.auto_topic,
-                               draft=opt.draft,
                                private=opt.private,
                                wip=opt.wip,
                                dest_branch=destination)