[PATCH v2 2/2] Add integer expressions files to .gitignore

[Jon Loeliger]

> Several files were added, and should be in .gitignore. The *.test.dts
> pattern should catch future source files which are generated by tests.
> It also subsumes the old *.dtb.test.dts pattern.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>
> ---
> Changes in v2:
> - Split ordering change into a separate patch

Applied.

jdl