configure: Add some option argument completions.

completions/configure

@@ -8,8 +8,17 @@ _configure()
     _init_completion -s || return
 
     case $prev in
+        -h|--help|-V|--version|--program-prefix|--program-suffix|\
+        --program-transform-name)
+            return
+            ;;
+        --*file)
+            _filedir
+            return
+            ;;
         --*prefix|--*dir)
             _filedir -d
+            return
             ;;
     esac