Creates a tar.gz:
* Identical results to the existing distributed tarballs
* Named "dahdi-linux-<version>.tar.gz"
* Only from committed files (uses git-archive)
* Adds a .version file
Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
Acked-by: Russ Meyerriecks <rmeyerriecks@digium.com>
