Update list_file_types.t
Update list_file_types.t

added .asc for asciidoc
JFLarvoire/the_silver_searcher,avih/the_silver_searcher,sebgod/the_silver_searcher,avih/the_silver_searcher,ggreer/the_silver_searcher,lizh06/the_silver_searcher,ggreer/the_silver_searcher,JFLarvoire/the_silver_searcher,avih/the_silver_searcher,JFLarvoire/the_silver_searcher,ggreer/the_silver_searcher,avih/the_silver_searcher,sebgod/the_silver_searcher,lizh06/the_silver_searcher,lecheel/the_silver_searcher,avih/the_silver_searcher,JFLarvoire/the_silver_searcher,JFLarvoire/the_silver_searcher,lizh06/the_silver_searcher,lecheel/the_silver_searcher,lecheel/the_silver_searcher,JFLarvoire/the_silver_searcher,sebgod/the_silver_searcher,lizh06/the_silver_searcher,JFLarvoire/the_silver_searcher,sebgod/the_silver_searcher,ggreer/the_silver_searcher,lecheel/the_silver_searcher