hg: jdk8u/jdk8u: 8267545: [8u] Enable Xcode 12 builds on macOS

[paul.hohensee at gmail.com]

Changeset: 50e950384272
Author:    phh
Date:      2021-06-09 21:44 +0000
URL:       https://hg.openjdk.java.net/jdk8u/jdk8u/rev/50e950384272

8267545: [8u] Enable Xcode 12 builds on macOS
Summary: Makefile patches to enable Xcode 12 builds
Reviewed-by: simonis, andrew
Contributed-by: benty at amazon.com, hohensee at amazon.com

! common/autoconf/basics.m4
! common/autoconf/flags.m4
! common/autoconf/generated-configure.sh
! common/autoconf/libraries.m4
! common/autoconf/platform.m4
! common/autoconf/toolchain.m4