hg: jdk/sandbox: Use own logic for locating tools

[magnus.ihse.bursie at oracle.com]

Changeset: 3c22ecf9f7f0
Author:    ihse
Date:      2020-07-03 21:11 +0200
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/3c22ecf9f7f0

Use own logic for locating tools

! make/autoconf/basic_tools.m4
! make/autoconf/util.m4
! make/autoconf/util_paths.m4