error_for_asm and warning_for_asm take const rtx_insn *

error_for_asm and warning_for_asm take const rtx_insn *

gcc/ChangeLog:
2014-09-10  David Malcolm  <dmalcolm@redhat.com>

	* final.c (this_is_asm_operands): Strengthen this variable from
	rtx to const rtx_insn *.
	* output.h (this_is_asm_operands): Likewise.
	* rtl-error.c (location_for_asm): Strengthen param "insn" from
	const_rtx to const rtx_insn *.
	(diagnostic_for_asm): Likewise.
	* rtl-error.h (error_for_asm): Likewise.
	(warning_for_asm): Likewise.

From-SVN: r215133