Fix remaining .rs.dtor() issue for RS.

BUG=5186750

Change-Id: I74765b844d28ed780f9c9e291b8e0de94352f74b
diff --git a/libs/rs/rsScriptC.cpp b/libs/rs/rsScriptC.cpp
index dccf71f..2e7f213 100644
--- a/libs/rs/rsScriptC.cpp
+++ b/libs/rs/rsScriptC.cpp
@@ -44,6 +44,7 @@
         BT = NULL;
     }
 #endif
+    mRSC->mHal.funcs.script.invokeFreeChildren(mRSC, this);
     mRSC->mHal.funcs.script.destroy(mRSC, this);
 }