[PATCH] app/test: fix include of standard header

[Morten Brørup]

> From: Bruce Richardson [mailto:bruce.richardson at intel.com]
> Sent: Friday, 21 July 2023 12.57
> 
> Standard headers, or headers not in the current directory generally,
> should be wrapped in "<>" rather than in regular quotes "". Fix one
> instance of unistd.h being included using quotes
> 
> Fixes: df468c4937bb ("app/test: refactor bonding checks with macros")
> Cc: stable at dpdk.org
> 
> Signed-off-by: Bruce Richardson <bruce.richardson at intel.com>
> ---

Acked-by: Morten Brørup <mb at smartsharesystems.com>