Refcount grpc_alarm object so that grpc_alarm_destroy can safely be called before the alarm event is dequeued from the completion queue
diff --git a/package.xml b/package.xml
index 10cb2e6..a3b591a 100644
--- a/package.xml
+++ b/package.xml
@@ -270,6 +270,7 @@
     <file baseinstalldir="/" name="src/core/lib/slice/slice_hash_table.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/slice/slice_internal.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/slice/slice_string_helpers.h" role="src" />
+    <file baseinstalldir="/" name="src/core/lib/surface/alarm_internal.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/api_trace.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/call.h" role="src" />
     <file baseinstalldir="/" name="src/core/lib/surface/call_test_only.h" role="src" />