re PR driver/57652 (collect2 does not clean up temporary files)

        PR driver/57652
        * collect2.c (collect_atexit): New.
        (collect_exit): Delete.
        (main): Register collect_atexit with atexit.
        (collect_wait): Change collect_exit to exit.
        (do_wait): Same.
        * collect2.h (collect_exit): Delete.
        * tlink.c (do_tlink): Rename exit to ret. Change collect_exit to exit.

From-SVN: r200226