v2021 ← v2022dev1: Fix gitattributes mismatches

This is due to the facts that:

1. this repository ships .gitattributes files
2. the CI pipeline forces on all files the attributes -text -eol -crlf -ident -filter -working-tree-encoding -export-subst
3. the package was likely originally imported in the repository without the above override, so the affected files were committed in their "normalized" form with LF line terminators instead of the CRLF that are actually expected

Fix the situation by:

1. setting the gitattributes override locally
2. extracting the orig tarball over the current sources
3. commit the changed files in their "denormalized" form, with CRLF line endings