add include for new rn lib

Author: Niall Brennan

src/_includes/content/react2-dest.md

@@ -0,0 +1,17 @@
+<!-- Usage: `include react-dest only={ios|android}` -->
+<!-- in the file we're pulling from the API, "name" corresponds with the path to the yml blob for a specific destination.-->
+{% assign currentSlug = page.url | split: "/" | last %}
+{% assign thisDest = site.data.catalog.destinations.items | where: "slug", currentSlug | first %}
+{% assign thisDestName = thisDest.display_name %}
+{% assign thisDestRNspecific = include.only %}
+
+
+{% if thisDestRNspecific %}
+<div class="premonition info">
+<div class="fa fa-info-circle"></div>
+<div class="content"><p>
+The {{thisDestName}} device-mode destination SDK is only available for {{thisDestRNspecific}} in React Native.
+</p></div></div>
+{%endif%}
+
+To add the {{thisDestName}} device-mode SDK to a [React Native](/docs/connections/sources/catalog/libraries/mobile/react-native/) project using Segment's new `2.0` release, please reference our supported [Destination Plugin documentation](/docs/connections/sources/catalog/libraries/mobile/react-native/#supported-destinations).

src/connections/destinations/catalog/appsflyer/index.md

@@ -62,6 +62,8 @@ To prevent this, you can enable the new **Fallback to send IDFV when advertising
 
 #### Additional React Native device-mode set up
 
+{% include content/react2-dest.md %}
+
 {% include content/react-dest.md %}
 
 ### Server