Add .#company-statistics-cache.el to .gitignore

This is the autosave file generated by Emacs while
company-statistics-cache.el is open. Normally I wouldn't want to add
autosave files to the .gitignore (since they should be deleted by time
you are committing), but company-statistics-cache.el is apparently
constantly open (as it is constantly being updated by Emacs).

.gitignore

@@ -1,5 +1,6 @@
 /.emacs.d/auto-save-list/
 /.emacs.d/company-statistics-cache.el
+/.emacs.d/.#company-statistics-cache.el
 /.emacs.d/elpa/
 /.emacs.d/ido.last
 /.emacs.d/projectile.cache