xfsprogs: update 'make deb' to use tarball

[Nathan Scott]

----- Original Message -----
> This patch changes the build process so that 'make deb' uses the same
> process of creating a source tree as the release script.
> 
> * Add a list of files which go in the release tarball in .gitcensus
>   This is needed so that you can create a tarball in a bare release
>   tree, when .git is not available.
> 
> * Modify the SRCTAR target to include files from .git_census and use
> tar
>   instead of git archive.
> 
> * Modify the SRCTARINC files to include .git_census, and include
>   .git_census in the 'make realclean' target.
> 
> * remove the 'make source-link' target.
> 
> Signed-off-by: Ben Myers <bpm at sgi.com>
> 

Reviewed-by: Nathan Scott <nathans at debian.org>

thanks!

--
Nathan