Support globs in $include and $exclude.

sdk/lib/_internal/pub/test/transformer/exclusion/exclude_asset_glob_test.dart

Index: sdk/lib/_internal/pub/test/transformer/exclusion/exclude_asset_glob_test.dart
diff --git a/sdk/lib/_internal/pub/test/transformer/exclusion/exclude_asset_list_test.dart b/sdk/lib/_internal/pub/test/transformer/exclusion/exclude_asset_glob_test.dart
similarity index 87%
copy from sdk/lib/_internal/pub/test/transformer/exclusion/exclude_asset_list_test.dart
copy to sdk/lib/_internal/pub/test/transformer/exclusion/exclude_asset_glob_test.dart
index 52930390aa482a2a4bb397613e4bdffb877da832..812e7b4f6dbfc454c0785dd3d94e7b09f0bb9723 100644
--- a/sdk/lib/_internal/pub/test/transformer/exclusion/exclude_asset_list_test.dart
+++ b/sdk/lib/_internal/pub/test/transformer/exclusion/exclude_asset_glob_test.dart
@@ -11,17 +11,14 @@ import '../../serve/utils.dart';
 main() {
   initConfig();
   withBarbackVersions("any", () {
-    integration("excludes a list of assets", () {
+    integration("allows a glob to exclude", () {
       d.dir(appPath, [
         d.pubspec({
           "name": "myapp",
           "transformers": [
             {
               "myapp/src/transformer": {
-                "\$exclude": [
-                  "web/foo.txt",
-                  "web/sub/foo.txt"
-                ]
+                "\$exclude": "**/foo.txt"
               }
             }
           ]
@@ -42,8 +39,8 @@ main() {
 
       pubServe();
       requestShould404("foo.out");
-      requestShould404("sub/foo.out");
       requestShouldSucceed("bar.out", "bar.out");
+      requestShould404("sub/foo.out");
       endPubServe();
     });
   });