[GRASS-git] [OSGeo/grass] 340c2a: GIS_H_VERSION: use git hash (#325)

[Markus Metz]

  Branch: refs/heads/releasebranch_7_8
  Home:   https://github.com/OSGeo/grass
  Commit: 340c2a4a0b0e8d90b5f2a1c5e322aac6e50a3d09
      https://github.com/OSGeo/grass/commit/340c2a4a0b0e8d90b5f2a1c5e322aac6e50a3d09
  Author: Markus Metz <33666869+metzm at users.noreply.github.com>
  Date:   2020-04-02 (Thu, 02 Apr 2020)

  Changed paths:
    M configure
    M configure.in
    M general/g.version/main.c
    M include/gis.h
    M include/version.h.in
    M lib/gis/gisinit.c

  Log Message:
  -----------
  GIS_H_VERSION: use git hash (#325)

previously, GIS_H_VERSION was the svn revision number of gis.h and GIS_H_DATE was the svn revision date of gis.h

now they are the git hash and date of the last change to GRASS headers (and anything else in include)
in g.version, these have been and are still referred to as GIS library revision number and date which is wrong, these are
GIS headers revision number and date, which is not the same

Co-authored-by: Huidae Cho <grass4u at gmail.com>
Co-authored-by: Martin Landa <landa.martin at gmail.com>