.gitattributes: Enforce LF line-endings on all non-binary files

.gitattributes: Enforce LF line-endings on all non-binary files

Although Git is able to automatically modify line-endings during checkin
and checkout, this brings a lot of trouble, especially when trying to
use a repository from different platforms (as Windows and Linux). This
is due to the fact that Git consults different local gitconfig settings
and uses problematic defaults if not set.

Therefore, Git should enfoce one type of line-ending (LF) and not
consult the local config, which is what the change from this commit
does.

Signed-off-by: Deniz Bahadir <deniz@code.bahadir.email>