h8300-protos.h: Add a prototype for h8300_current_function_interrupt_function_p.

	* config/h8300/h8300-protos.h: Add a prototype for
	h8300_current_function_interrupt_function_p.
	* config/h8300/h8300.c (interrupt_handler): Remove.
	(os_task): Likewise.
	(monitor): Likewise.
	(pragma_interrupt): New.
	(WORD_REG_USED): Use
	h8300_current_function_interrupt_function_p.
	(dosize): Likewise.
	(h8300_output_function_prologue): Likewise.
	Do not set interrupt_handler, os_task, monitor.
	(h8300_output_function_prologue): Use
	h8300_current_function_interrupt_function_p.
	Do not set interrupt_handler, os_task, monitor.
	(h8300_current_function_interrupt_function_p): New.
	(h8300_pr_interrupt): Set pragma_interrupt.
	(h8300_insert_attributes): Reset pragma_interrupt.

From-SVN: r60836