[PATCH v2] devtools: fix false positive from checkpatch

[Thomas Monjalon]

17/09/2024 18:56, Stephen Hemminger:
> The codespell dictionary has "stdio" in its bad word list,
> but stdio.h is often used in DPDK code and creates bogus false
> positives from checkpatch.
> 
> Also add a check to the parameters to build-dict.sh so it
> gives usage error if parameter is missing or does not point
> to the codespell git clone.
> 
> Signed-off-by: Stephen Hemminger <stephen at networkplumber.org>

Redirected error message to stderr,
and saved the dict path in a variable to avoid redundancy,
and applied, thanks.