git: openjdk/mobile: 8244592: Start supporting SOURCE_DATE_EPOCH

[duke]

Changeset: 1a16a4b6
Author:    Magnus Ihse Bursie <ihse at openjdk.org>
Date:      2020-05-07 17:47:11 +0000
URL:       https://git.openjdk.java.net/mobile/commit/1a16a4b6

8244592: Start supporting SOURCE_DATE_EPOCH

Reviewed-by: erikj

! make/Init.gmk
! make/InitSupport.gmk
! make/autoconf/configure.ac
! make/autoconf/jdk-options.m4
! make/autoconf/jdk-version.m4
! make/autoconf/spec.gmk.in
! make/autoconf/util.m4