hg: jdk/sandbox: Rename basics*.m4 to basic*.m4.

[magnus.ihse.bursie at oracle.com]

Changeset: 17dda9f54785
Author:    ihse
Date:      2020-02-21 11:10 +0100
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/17dda9f54785

Rename basics*.m4 to basic*.m4.

+ make/autoconf/basic.m4
+ make/autoconf/basic_windows.m4
- make/autoconf/basics.m4
- make/autoconf/basics_windows.m4
! make/autoconf/configure.ac