Add issue link to release notes

------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=184844870

Add issue link to release notes
------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=184844870
0384ff07 · andrewlewis · Andrew Lewis · 6fc70149 · 0384ff07
Commit 0384ff07 authored Feb 07, 2018 by andrewlewis Committed by Andrew Lewis Feb 08, 2018
Showing with 2 additions and 1 deletions
RELEASENOTES.md
--- a/RELEASENOTES.md
+++ b/RELEASENOTES.md
@@ -94,7 +94,8 @@
 * Fix potential NPE when removing media sources from a
  DynamicConcatenatingMediaSource
  ([#3796](https://github.com/google/ExoPlayer/issues/3796)).
-* Open source DownloadService, DownloadManager and related classes.
+* Open source DownloadService, DownloadManager and related classes
+  ([#2643](https://github.com/google/ExoPlayer/issues/2643)).
 ### 2.6.1 ###