Describe the repo launch version in repo version

repo version v1.7.8
         (from https://android.googlesource.com/tools/repo.git)
  repo launcher version 1.14
         (from /home/sop/bin/repo)
  git version 1.7.8.rc2.256.gcc761
  Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41)
  [GCC 4.4.3]

Change-Id: Ifcbe5b0e226a1a6ca85455eb62e4da5e9a0f0ca0

main.py

@@ -36,6 +36,7 @@ from git_config import init_ssh, close_ssh
 from command import InteractiveCommand
 from command import MirrorSafeCommand
 from command import PagedCommand
+from subcmds.version import Version
 from editor import Editor
 from error import DownloadError
 from error import ManifestInvalidRevisionError
@@ -334,6 +335,9 @@ def _Main(argv):
   _CheckWrapperVersion(opt.wrapper_version, opt.wrapper_path)
   _CheckRepoDir(opt.repodir)
 
+  Version.wrapper_version = opt.wrapper_version
+  Version.wrapper_path = opt.wrapper_path
+
   repo = _Repo(opt.repodir)
   try:
     try: