Expose GrContext::dump() when SK_ENABLE_DUMP_GPU is defined.

Change-Id: I499228454bc387de2c988b8f607320b7e5ea57b0
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/233557
Reviewed-by: Robert Phillips <robertphillips@google.com>
Commit-Queue: Brian Salomon <bsalomon@google.com>
diff --git a/RELEASE_NOTES.txt b/RELEASE_NOTES.txt
index 84f0c62..4784038 100644
--- a/RELEASE_NOTES.txt
+++ b/RELEASE_NOTES.txt
@@ -19,3 +19,5 @@
  * SkColorFilters::HSLAMatrix - new matrix color filter operating in HSLA space.
 
  * Modify GrBackendFormat getters to not return internal pointers. Use an enum class for GL formats.
+
+ * Expose GrContext::dump() when SK_ENABLE_DUMP_GPU is defined.