makedep: let umask decide mode for Makefiles

[Dan Kegel]

Paul Bryan Roberts write:
> The code as it stands creates makefiles with a mode of 600.  This may be
> benign on most (e.g. personal workstation) installations but not all.
>
>An example is where the wine git repository is located on an NFS
>volume.  Here security settings may mean that root:root is treated as
>nobody:nogroup.  Installation from the repository is not possible as
>root (whether via su or sudo) cannot even read the makefiles

Where I work, NFS is set up so root cannot access any NFS
volumes, period, because you really can't trust remote systems
that much with NFS.