use safer ecore_exe flags that close stdin/out/err more often
use safer ecore_exe flags that close stdin/out/err more often

commit b9d166f804718ae14e5158496baeab5e29864f82 introduced
safer exe functions that both prevent a child from having E's
stdin/stdout/stderr and ensure the child's fd 0 (and 1 and 2) are
"valid" file descriptors (to work around some buggy software that
assumes 0 is an invalid file descriptor)

This commit uses the safer functions when launching child programs from
the desktop menu as well.

ref T5606
@fix

tasn/enlightenment,tasn/enlightenment,tasn/enlightenment