Make 2020v10 roborio image work

Something changed from v9 to v10 that either reduced the stack size or
caused the roborio to start enforcing the stack size or *something*.
Bump up the stack size on all of our binaries.

Change-Id: I47df1aabfa8439f7bd12e78b1e6cdbef45c97b5a
diff --git a/aos/realtime.h b/aos/realtime.h
index a6b4223..bc80ee5 100644
--- a/aos/realtime.h
+++ b/aos/realtime.h
@@ -28,6 +28,8 @@
 
 void LockAllMemory();
 
+void ExpandStackSize();
+
 }  // namespace aos
 
 #endif  // AOS_REALTIME_H_