stage2 大量优化代码使其自举编译时间大幅缩短

stage2/utils/source.spl

@@ -6,7 +6,7 @@
 type .{ .Error, .Status, .make } = @import("error.spl");
 type .{ .ByteView, .FindResult } = @import("byte_view.spl");
 type .{ .Vec } = @import("vec.spl");
-type .{ .Map } = @import("map.spl");
+type .{ .Map, .hash_kind_view } = @import("map.spl");
 type .{ .hash_view, .eq_view } = @import("hash.spl");
 
 type Position = struct {
@@ -134,7 +134,7 @@ fn set_new(): Sources {
     ret Sources {
         .items = Vec.blank(@sizeof(Source), 8),
         .by_name = Map.blank(@sizeof(ByteView), @alignof(ByteView), @sizeof(usize),
-                             @alignof(usize), hash_view, eq_view),
+                             @alignof(usize), hash_kind_view()),
     };
 }