[PATCH] net/tap/bpf: fix meson warning

[Bruce Richardson]

On Tue, Jun 25, 2024 at 10:06:52AM -0700, Stephen Hemminger wrote:
> Meson was warning that run_command was used without check and
> the result of that will change in future version.
> 
> In this case, the command (uname -m) should be checked.
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>
> ---
Acked-by: Bruce Richardson <bruce.richardson at intel.com>