MFC 228157:

MFC 228157:
- Fix segmentation fault when running "+command" when run with -jX -n due
  to Compat_RunCommand() being called with `cmd' that is not on the
  node->commands list
- Make ellipsis ("..." command) handling consistent: check for "..." command
  in job make after variables expansion to match compat make behavior
- Fix empty command handling (after variables expansion and @+- modifiers
  are processed): now empty commands are ignored in compat make and are not
  printed in job make case

git-svn-id: svn://svn.freebsd.org/base/stable/9@241928 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f