hg: jdk/submit: 8244756: Build broken with some awk version after JDK-8244248

[martin.doerr at sap.com]

Changeset: 4f8be70ec25d
Author:    mdoerr
Date:      2020-05-12 11:11 +0200
URL:       https://hg.openjdk.java.net/jdk/submit/rev/4f8be70ec25d

8244756: Build broken with some awk version after JDK-8244248
Reviewed-by: mbaesken, xliu
Contributed-by: Magnus Ihse Bursie <magnus.ihse.bursie at oracle.com>

! make/autoconf/boot-jdk.m4