git: openjdk/mobile: 8244756: Build broken with some awk version after JDK-8244248

[duke]

Changeset: b29d982a
Author:    Magnus Ihse Bursie <magnus.ihse.bursie at oracle.com>
Committer: Martin Doerr <mdoerr at openjdk.org>
Date:      2020-05-12 11:11:02 +0000
URL:       https://git.openjdk.java.net/mobile/commit/b29d982a

8244756: Build broken with some awk version after JDK-8244248

Reviewed-by: mbaesken, xliu

! make/autoconf/boot-jdk.m4