git: openjdk/jdk15u-dev: 8261109: [macOS] Remove disabled warning for JNF in make/autoconf/flags-cflags.m4

[Vladimir Kempik]

Changeset: 6d64b786
Author:    Vladimir Kempik <vkempik at openjdk.org>
Date:      2021-07-27 12:32:45 +0000
URL:       https://git.openjdk.java.net/jdk15u-dev/commit/6d64b7867f46105585f886b410b0ea251bfcc746

8261109: [macOS] Remove disabled warning for JNF in make/autoconf/flags-cflags.m4

Backport-of: 3bb6a3d2ab96373baa4e18f4e61173f11225fd4e

! make/autoconf/flags-cflags.m4
! make/modules/java.base/Lib.gmk