The .gitattributes, .gitignore, .commit-template files do not need to be
present in packaged sources, as they are for people using the Git
repository.  People who download tarballs usually don't reimport into
Git -- they should just download the actual repositories.

Change-Id: I8d3eb36583d0fb6a3622f34427819fbc39b1b9ff
Reviewed-by: Alex Blasche <alexander.blasche@digia.com>
Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>

The .gitattributes and .gitignore files do not need to be present in
packaged sources, as they are for people using the Git repository.
People who download tarballs usually don't reimport into Git -- they
should just download the actual repositories.

Meanwhile, the .tag file is quite useful. Instead of making Git extract
to the useless SHA-1 of the "$Id$\n" string, ask git-archive to store
the SHA-1 of the commit being packaged.

Change-Id: Id2b018815ebc3313af30368bd9c321368bcddb67
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>