[PATCH v3] build: add missing arch define for Arm

[Thomas Monjalon]

20/01/2022 03:38, Ruifeng Wang:
> As per design document, RTE_ARCH is the name of the architecture.
> However, the definition was missing on Arm with meson build.
> It impacts applications that refers to this string.
> 
> Added for Arm builds.
> 
> Fixes: b1d48c41189a ("build: support ARM with meson")
> Cc: stable at dpdk.org
> 
> Reported-by: Stephen Hemminger <stephen at networkplumber.org>
> Signed-off-by: Ruifeng Wang <ruifeng.wang at arm.com>

Applied, thanks