* doc/c-cris.texi (CRIS-Opts): Document --no-mul-bug-abort,

	* doc/c-cris.texi (CRIS-Opts): Document --no-mul-bug-abort,
	--mul-bug-abort and the default behavior.
	* config/tc-cris.c (cris_insn_kind): New member CRIS_INSN_MUL.
	(err_for_dangerous_mul_placement): New variable.
	(STATE_MUL, OPTION_MULBUG_ABORT_ON, OPTION_MULBUG_ABORT_OFF): New
	macros.
	(md_cris_relax_table): Have placeholder for STATE_MUL.
	(md_longopts): New options --mul-bug-abort and --no-mul-bug-abort.
	(cris_relax_frag) <case ENCODE_RELAX (STATE_MUL, STATE_BYTE)>: New
	case doing nothing.
	(md_estimate_size_before_relax) <case ENCODE_RELAX (STATE_MUL,
	STATE_BYTE)>: Ditto.
	(md_convert_frag) <ENCODE_RELAX (STATE_MUL, STATE_BYTE)>: Check
	alignment and position of this frag, emit error message if
	suspicious.
	(md_assemble): For a multiply insn and when checking it,
	transform the current frag into a special frag for that purpose.
	(md_parse_option) <case OPTION_MULBUG_ABORT_OFF, case
	OPTION_MULBUG_ABORT_ON>: Handle new options.