terminal-unix: fix fallbacks in case terminfo/termcap are disabled

These two escape sequences were swapped. (They are used only if
terminfo/termcap are not available.)

osdep/terminal-unix.c

@@ -56,8 +56,8 @@ static volatile int tio_orig_set;
 
 int screen_width = 80;
 int screen_height = 24;
-char *terminal_erase_to_end_of_line = "\033[A";
-char *terminal_cursor_up = "\033[K";
+char *terminal_erase_to_end_of_line = "\033[K";
+char *terminal_cursor_up = "\033[A";
 
 typedef struct {
     char *cap;