Add 'create-react-class' to react dependencies for build (#9847)

**what is the change?:**
We needed this dependency in the package.json

**why make this change?:**
Even though `create-react-class` was added as a dependency to the
`package.json` in https://github.com/facebook/react/pull/9399/files we
didn't completely cherry-pick this change onto 15.6 from master in b48b259

This fixes that omission.
Following this fix we will review PR 9399 and make sure nothing else was
missed.

**test plan:**
`yarn build` and inspect the `builds/packages/react/package.json`, see
that `create-react-class` is included.

**issue:**
#9830

packages/react/package.json

@@ -23,6 +23,7 @@
     "node": ">=0.10.0"
   },
   "dependencies": {
+    "create-react-class": "^15.5.2",
     "fbjs": "^0.8.9",
     "loose-envify": "^1.1.0",
     "object-assign": "^4.1.0",