git: openjdk/jdk15u-dev: 8256538: Fix annoying awk warning in configure for java versions

[Yuri Nesterenko]

Changeset: 5f78ab10
Author:    Yuri Nesterenko <yan at openjdk.org>
Date:      2022-07-29 08:35:52 +0000
URL:       https://git.openjdk.org/jdk15u-dev/commit/5f78ab1084097fbd2f827ea6f364b6f6834156f0

8256538: Fix annoying awk warning in configure for java versions

Backport-of: 3110d589e126af5bcc7a96661a98c4dd97d8cf91

! make/autoconf/boot-jdk.m4