First pass at getting git and tar.gz working on Windows.

utils/tests/pub/pub.status

Index: utils/tests/pub/pub.status
diff --git a/utils/tests/pub/pub.status b/utils/tests/pub/pub.status
index ae0469535468fb8d8b6d8486947ef28fa34bef83..ff116e973aa1d7b23940162057ade5824c7a8f1e 100644
--- a/utils/tests/pub/pub.status
+++ b/utils/tests/pub/pub.status
@@ -35,15 +35,14 @@ pubspec_test: Skip
 lock_file_test: Skip
 version_solver_test: Skip
 
-# Right now, Pub update creates symlinks which aren't supported on Windows.
+# Git on Windows is cripplingly slow and will make these tests time out (#5271).
 [ $system == windows ]
-pub_test: Skip
-pub_install_test: Skip
 pub_install_git_test: Skip
-pub_install_repo_test: Skip
-pub_install_sdk_test: Skip
-pub_update_test: Skip
 pub_update_git_test: Skip
+
+# Getting non-determinstic network errors with these on Windows (#5272).
+[ $system == windows ]
+pub_install_repo_test: Skip
 pub_update_repo_test: Skip
 
 [ $compiler == frog ]