git: openjdk/jdk11u-dev: 8217233: Update build settings for AIX/xlc

[Martin Doerr]

Changeset: bc28d8f8
Author:    Tyler Steele <tyler.steele at ibm.com>
Committer: Martin Doerr <mdoerr at openjdk.org>
Date:      2022-04-12 14:27:18 +0000
URL:       https://git.openjdk.java.net/jdk11u-dev/commit/bc28d8f88f8f8a9150183109b891cee6457eb780

8217233: Update build settings for AIX/xlc

Backport-of: 74f9ec23e3eed594177743cbfcbe17705ccce9c1

! make/autoconf/flags-cflags.m4