2013-07-02  Joey Ye  <joey.ye@arm.com>

        Lite exit support.
        * README: Add information about lite-exit.
        * acconfig.h (_LITE_EXIT): New macro.
        * configure.in (enable-lite-exit): New option.
        (_LITE_EXIT): Define new macro.
        * configure: Regenerated.
        * newlib.hin (_LITE_EXIT): New macro.
        * libc/stdlib/__atexit.c [_LITE_EXIT]: Add dummy explicit
        reference to __call_exitprocs.
        * libc/stdlib/cxa_atexit.c [_LITE_EXIT]: Make __register_exitproc a
        weak reference.
        * libc/stdlib/exit.c (exit)[_LITE_EXIT]: Remove TWS and weakly reference
        __call_exitprocs.

2013-07-02  Joey Ye  <joey.ye@arm.com>

        * arm/crt0.S (_mainCRTStartup): Weak reference to atexit and _fini
        when lite exit is enabled.