Language Runtime README Changes (#650)

- Renaming old `README.md` files to keep their information intact.
- Default `README.md` files will have the deprecation notice to be mirrored back into the individual repos.
- Change ROCR-Runtime mirroring to `develop` branch.

.github/repos-config.json

@@ -115,7 +115,7 @@
     {
       "name": "rocr-runtime",
       "url": "ROCm/ROCR-Runtime",
-      "branch": "amd-staging",
+      "branch": "develop",
       "category": "projects",
       "auto_subtree_pull": false,
       "auto_subtree_push": true