I would like to atone for my sins. But later.

This fixes the windows build.  For some reason, MSVC believes that the
actor-compiled version of networkSender actually exists, but the
non-actor-compiled version doesn't exist.

This is a hackish workaround, as the largest reason to not include a
.g.h file is because it defines a POST_ACTOR_COMPILER define that messes
with actorcompiler.h's #defines.  We can just undefine that after
including the file.   ...but carefully.

fdbrpc/fdbrpc.h

@@ -26,7 +26,6 @@
 #include "FlowTransport.h" // NetworkMessageReceiver Endpoint
 #include "FailureMonitor.h"
 
-
 struct FlowReceiver : private NetworkMessageReceiver {
 	// Common endpoint code for NetSAV<> and NetNotifiedQueue<>
 
@@ -367,7 +366,12 @@ void load(Ar& ar, RequestStream<T>& value) {
 	value = RequestStream<T>(endpoint);
 }
 
-
-
 #endif
-#include "genericactors.actor.h"
+#if !defined(POST_ACTOR_COMPILER)
+#  define UNDEF_THE_ACTOR_COMPILER
+#endif
+#include "genericactors.actor.g.h"
+#if defined(UNDEF_THE_ACTOR_COMPILER)
+#  undef POST_ACTOR_COMPILER
+#  undef UNDEF_THE_ACTOR_COMPILER
+#endif