apps/speed: fix invalid final report when run SM2 benchmarks in parallel
apps/speed: fix invalid final report when run SM2 benchmarks in parallel

Fixed #11523
CLA: trivial

Signed-off-by: 张盛豪 <zhangshenghao1995@163.com>

Reviewed-by: Richard Levitte <5fb523282dd7956571c80524edc2dccfa0bd8234@openssl.org>
Reviewed-by: Paul Yang <184f6de988fc88cc661c91bad2c53ca35ab2d101@antfin.com>
(Merged from https://github.com/openssl/openssl/pull/11557)

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl