Documentation to fix order of hidl unlinkToDeath.

Calling unlinkToDeath after linking to death multiple
times will unregister the most recently registered
death recipient as expected.

Bug: 67503915
Test: hidl_test, hidl_test_java
Change-Id: Ifd79999f6899fe698dba2f937d22ccf9e4cfd839
diff --git a/transport/current.txt b/transport/current.txt
index 599b644..b338d12 100644
--- a/transport/current.txt
+++ b/transport/current.txt
@@ -18,3 +18,6 @@
 
 # Documentation fixups for b/78135149
 fcde1d0788066a62d5766f4dc19d4c1ec76967d5ddb636f59ccc66603460bcf8 android.hidl.manager@1.0::IServiceNotification
+
+# Clarification for b/67503915
+ec7fd79ed02dfa85bc499426adae3ebe23ef0524f3cd6957139324b83b18ca4c android.hidl.base@1.0::IBase