dtach: Update.

Signed-off-by: Rudá Moura <ruda.moura@gmail.com>
ctags: Update.

Signed-off-by: Rudá Moura <ruda.moura@gmail.com>
cscope: Update.

Signed-off-by: Rudá Moura <ruda.moura@gmail.com>
cflow: Update.

Signed-off-by: Rudá Moura <ruda.moura@gmail.com>