i386: Use "clobber (scratch)" in expanders

i386: Use "clobber (scratch)" in expanders

Use "clobber (scratch:M)" instad of "clobber (match_scratch:M N)" in expanders.

	* config/i386/i386.md (fixuns_trunc<mode>si2): Use
	"clobber (scratch:M)" instad of "clobber (match_scratch:M N)".
	(addqi3_cconly_overflow): Ditto.
	(umulv<mode>4): Ditto.
	(<s>mul<mode>3_highpart): Ditto.
	(tls_global_dynamic_32): Ditto.
	(tls_local_dynamic_base_32): Ditto.
	(atanxf2): Ditto.
	(asinxf2): Ditto.
	(acosxf2): Ditto.
	(logxf2): Ditto.
	(log10xf2): Ditto.
	(log2xf2): Ditto.
	(*adddi_4): Remove "m" constraint from scratch operand.
	(*add<mode>_4): Ditto.