[crosstool-ng/crosstool-ng] 0e45cd: autoconf: Update version numbering

[Bryan Hundven <bryanhundven at gmail dot com>]

  Branch: refs/heads/master
  Home:   https://github.com/crosstool-ng/crosstool-ng
  Commit: 0e45cdf62422fbcc69c10d4287c7f8a2f96c149d
      https://github.com/crosstool-ng/crosstool-ng/commit/0e45cdf62422fbcc69c10d4287c7f8a2f96c149d
  Author: Bryan Hundven <bryanhundven@gmail.com>
  Date:   2015-06-03 (Wed, 03 Jun 2015)

  Changed paths:
    R .version
    M configure.ac

  Log Message:
  -----------
  autoconf: Update version numbering

This change removes the static .version file, and moves to using the git
tag as the version number, the change number if the current commit is
newer then the latest tag, and '-dirty' if there are changes to the git
repository since the last commit that are uncommitted.

This helps us in the troubleshooting process to identify if the user is:
* using a released version (i.e.: 1.21.0)
* using a clone from git (i.e.: 1.21.0-29-13e14f)
* using a clone from git with local uncommitted changes (i.e.: 1.21.0-29-13e14f-dirty)

Signed-off-by: Bryan Hundven <bryanhundven@gmail.com>
Acked-by: "Yann E. MORIN" <yann.morin.1998@free.fr>


  Commit: 334c22a4cc38b92905d1191037062a742d3465bb
      https://github.com/crosstool-ng/crosstool-ng/commit/334c22a4cc38b92905d1191037062a742d3465bb
  Author: Bryan Hundven <bryanhundven@gmail.com>
  Date:   2015-06-03 (Wed, 03 Jun 2015)

  Changed paths:
    R .version
    M configure.ac

  Log Message:
  -----------
  Merge pull request #111 from bhundven/update_versioning

autoconf: Update version numbering


Compare: https://github.com/crosstool-ng/crosstool-ng/compare/a0fb7660f87f...334c22a4cc38

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