Improve resource usage of flutter recipe.

Instead of waiting to complete fuchsia task after triggering wait for
results until the end of the execution.

Change-Id: I7c52992f6d3c08579872b615302cbbc3fd3101a7
Reviewed-on: https://flutter-review.googlesource.com/c/recipes/+/2420
Reviewed-by: Kaushik Iska <kaushikiska@google.com>
11 files changed
tree: a7ebed708833394b9e22635ddbc0b27c2b4c8a01
  1. infra/
  2. recipe_modules/
  3. recipes/
  4. .gitignore
  5. .style.yapf
  6. recipes.py