.gitignore: Ignore the moveconfig database

This file is produced by the moveconfig.py tool. It should never be added
to the repo, so add it to the .gitignore file.

Signed-off-by: Simon Glass <sjg@chromium.org>
diff --git a/.gitignore b/.gitignore
index 3adf1fa..3a4d056 100644
--- a/.gitignore
+++ b/.gitignore
@@ -105,3 +105,6 @@
 # pylint files
 /pylint.cur
 /pylint.out/
+
+# moveconfig database
+/moveconfig.db