(w32_draw_fringe_bitmap): Copy unadapted code from

(w32_draw_fringe_bitmap): Copy unadapted code from
xterm.c to handle overlayed fringe bitmaps and to use cursor color
for displaying cursor in fringe.
(w32_define_fringe_bitmap, w32_destroy_fringe_bitmap): New W32
specific functions to define and destroy fringe bitmaps in fringe_bmp.
(w32_redisplay_interface): Add them to redisplay_interface.
(w32_term_init): Call w32_init_fringe instead of explicitly
defining fringe bitmaps in fringe_bmp array.
(x_delete_display): Call w32_reset_fringes instead of explicitly
destroying fringe bitmaps in fringe_bmp array.