[Intel-gfx] [PATCH] drm/i915: ignore generated files for header test

[Chris Wilson]

Quoting Lucas De Marchi (2019-07-26 22:23:44)
> These are generated source that can be ignored by git.

They're the stale generated headers from our old mechanism, right?

See commit e846f0dc57f441e5e93194d39bc9b8ac2ab5e0a4
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Tue Jun 4 15:42:48 2019 +0300

    kbuild: add support for ensuring headers are self-contained

for when this ignore was dropped.
-Chris