[LTP] [PATCH] arm64: add tst_atomic_add_return

[Cyril Hrubis]

Hi!
> @Cyril: would you like to try this too on some SuSe distros
> or can I go ahead and push it?

I've tried it on SLES12 SP2 on aarch64, everything seems to work fine,
go ahead and push it.

-- 
Cyril Hrubis
chrubis@suse.cz