ia32: add %E emit format for entities

ir/be/ia32/ia32_emitter.c

@@ -533,6 +533,12 @@ destination_operand:
 				reg = arch_get_irn_register_out(node, *fmt++ - '0');
 				goto emit_R;
 
+			case 'E': {
+				const ir_entity *const entity = va_arg(ap, const ir_entity*);
+				be_gas_emit_entity(entity);
+				break;
+			}
+
 			case 'F':
 				if (*fmt == 'M') {
 					ia32_emit_x87_mode_suffix(node);

ir/be/ia32/ia32_emitter.h

@@ -23,6 +23,7 @@
  * %ASx <node>                  address mode of the node or source register x
  * %B   <node>                  operands for binary operation
  * %Dx  <node>                  destination register x
+ * %E   ir_entity const*        emit entity name
  * %Fx  <node>                  x87 register x
  * %FM  <node>                  x87 mode suffix
  * %FX  <node>                  SSE mode suffix