Precompile immutable globally-installed pub executables.

sdk/lib/_internal/pub/test/global/activate/git_package_test.dart

Index: sdk/lib/_internal/pub/test/global/activate/git_package_test.dart
diff --git a/sdk/lib/_internal/pub/test/global/activate/git_package_test.dart b/sdk/lib/_internal/pub/test/global/activate/git_package_test.dart
index eea65e8e411eec71979ca9e5402d4c447ce2d07b..d6a887bd78bc77084a3dfce8cc4e8ef4d9b62a05 100644
--- a/sdk/lib/_internal/pub/test/global/activate/git_package_test.dart
+++ b/sdk/lib/_internal/pub/test/global/activate/git_package_test.dart
@@ -21,6 +21,9 @@ main() {
         output: '''
             Resolving dependencies...
             + foo 1.0.0 from git ../foo.git
+            Precompiling executables...
+            Loading source assets...
+            Precompiled foo:foo.
             Activated foo 1.0.0 from Git repository "../foo.git".''');
   });
 }