Fuchsia: Fix eventhandler for changed syscall return

runtime/bin/eventhandler_fuchsia.cc

Index: runtime/bin/eventhandler_fuchsia.cc
diff --git a/runtime/bin/eventhandler_fuchsia.cc b/runtime/bin/eventhandler_fuchsia.cc
index 2a611647f0bf13e0442d3ecf6c2d71b5674ef8e9..ff03f14ab9e9f756a9efff034b89e54dc3859d4e 100644
--- a/runtime/bin/eventhandler_fuchsia.cc
+++ b/runtime/bin/eventhandler_fuchsia.cc
@@ -75,9 +75,9 @@ void EventHandlerImplementation::HandleInterruptFd() {
       UNIMPLEMENTED();
     }
   }
-  // status == ERR_BAD_STATE when we try to read and there are no messages
-  // available, so it is an error if we get here and status != ERR_BAD_STATE.
-  if (status != ERR_BAD_STATE) {
+  // status == ERR_SHOULD_WAIT when we try to read and there are no messages
+  // available, so it is an error if we get here and status != ERR_SHOULD_WAIT.
+  if (status != ERR_SHOULD_WAIT) {
     FATAL1("mx_msgpipe_read failed: %s\n", mx_status_get_string(status));
   }
 }