RFR: 8258426: Split up autoconf/version-numbers and move it to conf dir

[Magnus Ihse Bursie]

The file `make/autoconf/version-numbers` is plagued by a two-fold problem: first of all, it's a configuration file, not a part of autoconf, so it should reside in `make/conf` instead of `make/autoconf`.

Secondly, contrary to the name, it does not only contain version numbers, but also the branding properties (company name, product name, etc). This should be split out into a separate branding configuration file.

This is the last patch in the series of moving configuration into `make/conf`.

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Commit messages:
 - 8258426: Split up autoconf/version-numbers and move it to conf dir

Changes: https://git.openjdk.java.net/jdk/pull/1786/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1786&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258426
  Stats: 151 lines in 7 files changed: 81 ins; 55 del; 15 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1786.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1786/head:pull/1786

PR: https://git.openjdk.java.net/jdk/pull/1786