vt: add new dynamically generated files to .gitignore

Add new dynamically generated headers to the local .gitignore.

Fixes: c2d2c5c0 ("vt: move UCS tables to the "shipped" form")
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Reviewed-by: Nicolas Pitre <npitre@baylibre.com>
Link: https://lore.kernel.org/r/20250430122917.72105-1-brgl@bgdev.pl


Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>