prod/Common: try to obtain more consistent handling of \033 in echo
prod/Common: try to obtain more consistent handling of \033 in echo

- Common (g_echo): wrapper for /bin/echo -e
- Common (pass, fail, todo): use g_echo instead of regular "echo" for
  strings containing escape sequences

cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan,cfriedt/ben-wpan