git: openjdk/jdk: 8287254: Clean up Xcode sysroot logic

[Magnus Ihse Bursie]

Changeset: d889319a
Author:    Magnus Ihse Bursie <ihse at openjdk.org>
Date:      2022-05-25 08:06:23 +0000
URL:       https://git.openjdk.java.net/jdk/commit/d889319a86101e944aefd4ad7f300505abbe5b30

8287254: Clean up Xcode sysroot logic

Reviewed-by: erikj

! make/autoconf/basic.m4
! make/autoconf/spec.gmk.in
! make/autoconf/toolchain.m4
! make/modules/jdk.hotspot.agent/Gensrc.gmk