Fix #9221.

- When an image creation notification is received, the thread
  that provoked it needs to be suspended until the debugger has
  finished loading the image's debug information. Otherwise, if that
  image had a breakpoint in it, it was possible that the thread would
  execute past the code where the breakpoint should be before the
  debugger had a chance to actually install it.

- Only update breakpoints when debug info loading has actually finished.

src/apps/debugger/controllers/TeamDebugger.h

@@ -103,7 +103,12 @@ private:
 private:
 	struct ImageHandler;
 	struct ImageHandlerHashDefinition;
+	struct ImageInfoPendingThread;
+	struct ImageInfoPendingThreadHashDefinition;
+
 	typedef BOpenHashTable<ImageHandlerHashDefinition> ImageHandlerTable;
+	typedef BOpenHashTable<ImageInfoPendingThreadHashDefinition>
+		ImageInfoPendingThreadTable;
 
 private:
 	static	status_t			_DebugEventListenerEntry(void* data);
@@ -166,6 +171,7 @@ private:
 			ThreadHandlerTable	fThreadHandlers;
 									// protected by the team lock
 			ImageHandlerTable*	fImageHandlers;
+			ImageInfoPendingThreadTable* fImageInfoPendingThreads;
 			DebuggerInterface*	fDebuggerInterface;
 			TeamDebugInfo*		fTeamDebugInfo;
 			FileManager*		fFileManager;