hg: jdk/sandbox: 3 new changesets

[magnus.ihse.bursie at oracle.com]

Changeset: 96fc965f7c06
Author:    ihse
Date:      2020-05-15 13:05 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/96fc965f7c06

cygwin cmd.exe bug fix.

! make/autoconf/basic_tools.m4

Changeset: e59bb640a0cb
Author:    ihse
Date:      2020-06-06 01:32 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/e59bb640a0cb

Support msys2.

! make/autoconf/build-aux/config.sub
! make/autoconf/platform.m4

Changeset: 4403c9e05993
Author:    ihse
Date:      2020-06-06 01:34 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/4403c9e05993

Merge

! make/autoconf/basic_tools.m4