Add option for client to own semaphores after telling to skia to wait.

Bug: chromium:1004772
Change-Id: Ifdad0b12925d13d3e896f6321c35312f9daa330c
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/301216
Commit-Queue: Greg Daniel <egdaniel@google.com>
Reviewed-by: Brian Salomon <bsalomon@google.com>
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index 4a6b126..dd3471c 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -7,6 +7,9 @@
 Milestone 86
 ------------
 
+  * Add option for clients to own semaphores after wait calls.
+    https://review.skia.org/301216
+
   * Remove obsolete GrFlushFlags.
     https://review.skia.org/298818