update homepage URIs

Change-Id: I482a72bf296978625b1e82ef580b0e0d4d57ff25

README.md

@@ -6,9 +6,9 @@ development workflow.  Repo is not meant to replace Git, only to make it
 easier to work with Git.  The repo command is an executable Python script
 that you can put anywhere in your path.
 
-* Homepage: https://code.google.com/p/git-repo/
+* Homepage: https://gerrit.googlesource.com/git-repo/
 * Bug reports: https://code.google.com/p/git-repo/issues/
-* Source: https://code.google.com/p/git-repo/
+* Source: https://gerrit.googlesource.com/git-repo/
 * Overview: https://source.android.com/source/developing.html
 * Docs: https://source.android.com/source/using-repo.html
 * [repo Manifest Format](./docs/manifest-format.md)

subcmds/upload.py

@@ -129,7 +129,7 @@ repo will make use of only the command line option.
 References
 ----------
 
-Gerrit Code Review:  http://code.google.com/p/gerrit/
+Gerrit Code Review:  https://www.gerritcodereview.com/
 
 """