D9880: Fix build with >=attr-2.4.48

[Andreas Sturmlechner]

This revision was automatically updated to reflect the committed changes.
Closed by commit R286:4bbc7a2f5c77: Fix build with >=attr-2.4.48 (authored by Lars Wendler <polynomial-c at gentoo.org>, committed by asturmlechner).

REPOSITORY
  R286 KFileMetaData

CHANGES SINCE LAST UPDATE
  https://phabricator.kde.org/D9880?vs=25352&id=25492

REVISION DETAIL
  https://phabricator.kde.org/D9880

AFFECTED FILES
  cmake/FindXattr.cmake
  src/xattr_p.h

To: asturmlechner, #frameworks, mgallien
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