Add symbol info for parameters and local variables

boot/test.elna

@@ -0,0 +1,14 @@
+program
+
+proc _main(x: Word)
+var loca0: Word
+loca4: Word
+begin
+	loca0 := 0x0a2c3061;
+	loca4 := x;
+	_write_out(@loca4, 4)
+end
+
+begin
+	_main()
+end.