Update progress before running the hook.

This will let progress show the name of the hook while it's running.

Change-Id: I14ef2a9b5fd2bc4d8d778f5402f78a5827ffbb08
Reviewed-on: https://chromium-review.googlesource.com/731469
Reviewed-by: Dirk Pranke <dpranke@chromium.org>
Reviewed-by: Nico Weber <thakis@chromium.org>
Commit-Queue: Daniel Cheng <dcheng@chromium.org>

gclient.py

@@ -1027,9 +1027,9 @@ class Dependency(gclient_utils.WorkItem, DependencySettings):
     if progress:
       progress._total = len(hooks)
     for hook in hooks:
-      hook.run(self.root.root_dir)
       if progress:
         progress.update(extra=hook.name or '')
+      hook.run(self.root.root_dir)
     if progress:
       progress.end()