message: Update README.md's DoNotStrip instructions
diff: @@ -49,22 +49,16 @@ or other complex ways an entity could be reached.
  Here's how you ensure Redex will not delete or rename something:
  -Annotate any class, method, or field you want to keep with `@DoNotStrip`.
  +Annotate any class, method, or field you want to keep with `@DoNotStrip`, and
  +add this to your ProGuard config file (which should be passed to redex.py via
  +the `--proguard-config` flag):
  -Add this to your redex config (at the uppermost level of the json) to
  -prevent deletion:
  ```
  -"keep_annotations": [
  - "Lcom/path/to/your/DoNotStrip;"
  -]
  -```
  -
  -and add this to your config to prevent renaming:
  -```
  -"RenameClassesPassV2" : {
  - "dont_rename_annotated": [
  - "Lcom/path/to/your/DoNotStrip;"
  - ]
  +# Do not strip classes annotated with @DoNotStrip
  +-keep @com.path.to.your.DoNotStrip class *
  +# Do not strip annotated fields or methods either
  +-keepclassmembers class * {
  + @com.path.to.your.DoNotStrip *;
  }
  ```
  