Wrong attributes with depcomp, missing, install-sh

Hello !

There is a problem with attributes of some
files with SDL helper libs under Windows Vista with

When using Vista i create user accounts, so i don’t have
to be admin or root all the time.

SDL_Net for example creates depcomp, missing and install-sh
with attributes r and x for the group and no r and x for the actual
user. The same goes for the other helper libs like SDL_image and so on.