hg: jdk/sandbox: Merge

[magnus.ihse.bursie at oracle.com]

Changeset: 6e1a74066d9c
Author:    ihse
Date:      2020-04-28 21:10 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/6e1a74066d9c

Merge

! make/CompileJavaModules.gmk
! make/RunTestsPrebuiltSpec.gmk
! make/autoconf/boot-jdk.m4
! make/autoconf/spec.gmk.in
! make/jdk/src/classes/build/tools/generatecharacter/GenerateCharacter.java