abc9: put 'aigmap' back

passes/techmap/abc9.cc

@@ -353,6 +353,7 @@ struct Abc9Pass : public ScriptPass
 				run("design -load $abc9_holes");
 				run("techmap -wb -map %$abc9 -map +/techmap.v");
 				run("opt -purge");
+				run("aigmap");
 				run("design -stash $abc9_holes");
 				run("design -load $abc9");
 				run("design -delete $abc9");