message: Update build instructions in README
diff: @@ -57,9 +57,9 @@ Now, [Rush](https://github.com/Microsoft/web-build-tools/wiki/Rush) takes over t
  |----------------------|------------------|------------------|
  | Install dependencies | rush install | npm install |
  | Check dependencies | rush check | N/A |
  -| Clean output | rush rebuild | npm run clean |
  -| Rebuild source | rush rebuild | npm run build -s |
  -| Incremental build | rush build | N/A |
  +| Clean output | npm run clean | npm run clean |
  +| Rebuild source | rush rebuild -v | npm run build -s |
  +| Incremental build | rush build -v | N/A |
  | Run tests | npm test -s | npm test -s |
  | Run lint rules | npm run lint -s | npm run lint -s |
  