upstream: dtc: Adjust .gitignore to be in alphabetical order

This is the intent, so correct it.

Signed-off-by: Simon Glass <sjg@chromium.org>
(cherry picked from commit 84a94f6ffcab762f44e44cba3409b7bc5fa46a89)

Change-Id: I4bc2e8c0762df0904529181cfc5264d30d90c9c9
1 file changed