* term/mac-win.el: Add ASCII equivalents for some function keys.

* term/mac-win.el: Add ASCII equivalents for some function keys.
(mode-line-frame-identification): Sync with x-win.el.
* macfns.c (x_real_positions): Save the current window port and
set a new one before obtaining the global coordinate.  Use
FRAME_MAC_WINDOW.
(x_set_name, x_set_title): Encode title to UTF8.  Use
SetWindowTitleWithCFString.
(Fx_server_version): Get correct OS version.
* macmenu.c (add_menu_item): Remove unused variable `i'.  Don't
let separator items destroy refence constants of other menu items.
* macterm.c (x_update_end): Move SetPortWindowPort to inside
BLOCK_INPUT.
(x_set_offset): Use FRAME_MAC_WINDOW.
* xdisp.c (note_mouse_highlight): Set the mouse pointer shape to
nontext_cursor if it is on a scroll bar.
* s/darwin.h (LIBS_CARBON): New define to specify libraries for
Carbon support.
(LD_SWITCH_SYSTEM_TEMACS): Don't link with unused libstdc++.  Use
LIBS_CARBON.