git: openjdk/jdk17u-dev: 8323008: filter out harmful -std* flags added by autoconf from CXX

[Goetz Lindenmaier]

Changeset: a632e300
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2024-01-18 15:12:02 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/a632e300a9aa5fc5ec51e0057c2739784811df5d

8323008: filter out harmful -std* flags added by autoconf from CXX

Backport-of: 68c4286026bc2c0ec0f594e0b96fe03fe5624d6d

! make/autoconf/toolchain.m4
! make/autoconf/util.m4