goextensions/builder: glob match deps instead of string.Contains

[ChenJesse]

Before this commit, the way taskrunner works is:

1. when you use builder.WrapWithGoBuild, it looks at the import graph and registers those as dependencies
2. we set goBuildTask.Sources = append(goBuildTask.Sources, filepath.Join("/*.go"), "/config_override.json") which means that all Go files will trigger our invalidation logic
3. when invalidation logic is triggered, we look for an import graph dependency that matches the Go file that was changed. One of the deps is pylon/infra/localdev, and unfortunately the playground main.go file path is pylon/infra/localdev/playground/main.go, which satisfies this invalidation logic

Instead, let's use globs to ensure that the matches only apply if the file is one level deep.