hg: jdk/sandbox: Trying to get rid of EXE_SUFFIX.

[magnus.ihse.bursie at oracle.com]

Changeset: 4b0708d0aba5
Author:    ihse
Date:      2020-07-03 16:22 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/4b0708d0aba5

Trying to get rid of EXE_SUFFIX.

! make/autoconf/boot-jdk.m4
! make/autoconf/jdk-options.m4
! make/autoconf/toolchain.m4
! make/autoconf/util.m4