* win32-low.c (soft_interrupt_requested, faked_breakpoint): New

	* win32-low.c (soft_interrupt_requested, faked_breakpoint): New
	global variables.
	(child_add_thread): Minor cleanup.
	(child_continue): Resume artificially suspended threads before
	calling ContinueDebugEvent.
	(suspend_one_thread): New.
	(fake_breakpoint_event): New.
	(get_child_debug_event): Change return type to int.  Check here if
	gdb sent an interrupt request.  If a soft interrupt was requested,
	fake a breakpoint event.  Return 0 if there is no event to handle,
	and 1 otherwise.
	(win32_wait): Don't check here if gdb sent an interrupt request.
	Ensure there is a valid event to handle.
	(win32_request_interrupt): Add soft interruption method as last
	resort.