Added change in nimble submodule to handle crash in case of non-started timer is attempted to be deleted.
@@ -1 +1 @@
-Subproject commit a90d8e46b87ea026182b97d8311dafc15c577714
+Subproject commit aef55bbf636ed580d4d6408a5c2e75d1f70a875e
Rahul Tank