[FS#993] gre tunnel dropping all TX packets

[LEDE Bugs]

The following task has a new comment added:

FS#993 - gre tunnel dropping all TX packets
User who did this - Aleksey (ambientsummer)

----------
I do not confirm. Xiaomi MiWiFi Mini with SNAPSHOT r4710-e622b30730. GRE works without problem.
Also busybox ip doesn't support -s.
----------

More information can be found at the following URL:
https://bugs.lede-project.org/index.php?do=details&task_id=993#comment3387