git: openjdk/jdk: 8298038: [s390] Configure script detects num_cores +1

[Tyler Steele]

Changeset: 0eb1f66f
Author:    Amit Kumar <amitlocham09 at icloud.com>
Committer: Tyler Steele <tsteele at openjdk.org>
Date:      2023-01-27 05:41:05 +0000
URL:       https://git.openjdk.org/jdk/commit/0eb1f66fd8356759c39054fee026a7940aae2673

8298038: [s390] Configure script detects num_cores +1

Reviewed-by: tsteele, erikj

! make/autoconf/build-performance.m4