Updated .dir-locals.el.  (M)

`coding' can't be specified and `compile-command' is always unsafe.
Better use something else.

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>
Fix typo. (M)

Signed-off-by: Rüdiger Sonderfeld <ruediger@c-plusplus.de>