[Reproducer] Add a `cont` to ModuleCXX.test

On more than one occasion I've found this test got stuck during replay
while waiting for a packet from debugserver when the debugger was in the
process of being destroyed. For some reason it's more prevalent on the
downstream Swift fork. Adding a cont mitigates the problem while I
investigate.

llvm-svn: 371144

lldb/lit/Reproducer/Modules/Inputs/ModuleCXX.in

@@ -3,4 +3,5 @@ run
 expr -l Objective-C++ -- @import Foo
 expr -l Objective-C++ -- @import Bar
 expr -- Bar()
+cont
 reproducer generate