This option is now included in the AppCompat library.
The AppCompat version of the RatingBar is used automatically.
http://developer.android.com/reference/android/support/v7/widget/AppCompatRatingBar.html
Example (from my own app):
<RatingBar
android:id="@+id/rating"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:numStars="5"
android:stepSize="1"
android:theme="@style/RatingBar"/>
With theme:
<style name="RatingBar" parent="Theme.AppCompat">
<item name="colorControlNormal">@color/duskYellow</item>
<item name="colorControlActivated">@color/lightGrey</item>
</style>