dir-locals: run testing, then examples for default compile-command

By default we should test all our code for regressions.  I'm always
running the examples anyway to test new features, so we should have
that recipe run afterwards.

If a test fails, that's first priority to fix.

If an example fails, time to continue working.

.dir-locals.el

@@ -1,6 +1,6 @@
 ;;; Directory Local Variables            -*- no-byte-compile: t -*-
 ;;; For more information see (info "(emacs) Directory Variables")
 
-((nil . ((compile-command . "make MODE=debug")
+((nil . ((compile-command . "make MODE=debug test examples")
          (+license/license-choice . "GNU General Public License Version 2")))
  (c-mode . ((mode . clang-format))))