[C++/mingw] handle_output_debug_string

[C++/mingw] handle_output_debug_string

Fixes:

 ../../../src/gdb/gdbserver/win32-low.c: In function 'int win32_kill(int)':
 ../../../src/gdb/gdbserver/win32-low.c:823:46: error: invalid conversion from 'int' to 'target_waitkind' [-fpermissive]
     struct target_waitstatus our_status = { 0 };
					       ^

handle_output_debug_string doesn't use the parameter for anything
(it's an output parameter in the gdb version), so just remove it.

gdb/gdbserver/ChangeLog:
2015-11-17  Pedro Alves  <palves@redhat.com>

	* win32-low.c (handle_output_debug_string): Remove parameter.
	(win32_kill): Remove our_status local and adjust call to
	handle_output_debug_string.
	(get_child_debug_event): Adjust call to
	handle_output_debug_string.