Work around stage1 not yet returning null-terminated @typeInfo strings

These changes can be reverted the next time stage1 is updated.

deps/aro/aro/Attribute.zig

@@ -645,7 +645,7 @@ pub const Arguments = blk: {
     var union_fields: [decls.len]ZigType.UnionField = undefined;
     for (decls, &union_fields) |decl, *field| {
         field.* = .{
-            .name = decl.name,
+            .name = decl.name ++ "",
             .type = @field(attributes, decl.name),
             .alignment = 0,
         };

lib/std/enums.zig

@@ -14,7 +14,7 @@ pub fn EnumFieldStruct(comptime E: type, comptime Data: type, comptime field_def
     var fields: []const StructField = &[_]StructField{};
     for (std.meta.fields(E)) |field| {
         fields = fields ++ &[_]StructField{.{
-            .name = field.name,
+            .name = field.name ++ "",
             .type = Data,
             .default_value = if (field_default) |d| @as(?*const anyopaque, @ptrCast(&d)) else null,
             .is_comptime = false,

lib/std/io.zig

@@ -635,7 +635,7 @@ pub fn PollFiles(comptime StreamEnum: type) type {
     var struct_fields: [enum_fields.len]std.builtin.Type.StructField = undefined;
     for (&struct_fields, enum_fields) |*struct_field, enum_field| {
         struct_field.* = .{
-            .name = enum_field.name,
+            .name = enum_field.name ++ "",
             .type = fs.File,
             .default_value = null,
             .is_comptime = false,

lib/std/meta.zig

@@ -556,7 +556,7 @@ pub fn FieldEnum(comptime T: type) type {
     var decls = [_]std.builtin.Type.Declaration{};
     inline for (field_infos, 0..) |field, i| {
         enumFields[i] = .{
-            .name = field.name,
+            .name = field.name ++ "",
             .value = i,
         };
     }
@@ -628,7 +628,7 @@ pub fn DeclEnum(comptime T: type) type {
     var enumDecls: [fieldInfos.len]std.builtin.Type.EnumField = undefined;
     var decls = [_]std.builtin.Type.Declaration{};
     inline for (fieldInfos, 0..) |field, i| {
-        enumDecls[i] = .{ .name = field.name, .value = i };
+        enumDecls[i] = .{ .name = field.name ++ "", .value = i };
     }
     return @Type(.{
         .Enum = .{

src/value.zig

@@ -4050,7 +4050,7 @@ pub const Value = struct {
         const tags = @typeInfo(Tag).Enum.fields;
         var fields: [tags.len]std.builtin.Type.StructField = undefined;
         for (&fields, tags) |*field, t| field.* = .{
-            .name = t.name,
+            .name = t.name ++ "",
             .type = *@field(Tag, t.name).Type(),
             .default_value = null,
             .is_comptime = false,