[ios][android] Add change log entries

platform/android/CHANGELOG.md

@@ -4,6 +4,9 @@ Mapbox welcomes participation and contributions from everyone.  If you'd like to
 
 ## master
 
+### Bug fixes
+ - Fixed constant repainting for the sources with invisible layers, caused by `RenderSource::hasFadingTiles()` returning `true` all the time. [#15600](https://github.com/mapbox/mapbox-gl-native/pull/15600)
+
 ## 8.4.0-alpha.2 - September 11, 2019
 [Changes](https://github.com/mapbox/mapbox-gl-native/compare/android-v8.4.0-alpha.1...android-v8.4.0-alpha.2) since [Mapbox Maps SDK for Android v8.4.0](https://github.com/mapbox/mapbox-gl-native/releases/tag/android-v8.4.0-alpha.1): 
 

platform/ios/CHANGELOG.md

@@ -28,6 +28,7 @@ Mapbox welcomes participation and contributions from everyone. Please read [CONT
 * Fixed a potential integer overflow at high zoom levels. ([#15560](https://github.com/mapbox/mapbox-gl-native/pull/15560))
 * Fixed a bug with annotation view positions after camera transitions. ([#15122](https://github.com/mapbox/mapbox-gl-native/pull/15122/))
 * Fixed a bug where the completion block passed to `-[MGLMapView flyToCamera:completionHandler:]` (and related methods) wouldn't be called. ([#15473](https://github.com/mapbox/mapbox-gl-native/pull/15473))
+* Fixed constant repainting for the sources with invisible layers, caused by `RenderSource::hasFadingTiles()` returning `true` all the time. ([#15600](https://github.com/mapbox/mapbox-gl-native/pull/15600))
 
 ## 5.3.0 - August 28, 2019