Configure .git/info/attributes to suppress content transformations

Some upstreams ship .gitattributes that apply transformations on commit and checkout. These transformation may cause files to not match their counterparts in the tarballs, causing dpkg-source to fail.

Only attributes affecting the working tree are suppressed.

As Git adds more transformations, they also need to be suppressed.

Consult the dgit source code for the up-to-date list.

Signed-off-by: Andrej Shadura andrew.shadura@collabora.co.uk