[cr tool] Allow info command to accept '--out' argument.

R=miguelg@chromium.org
BUG=none
TEST=cr info -o out_<foo>/Debug prints the configuration from the
     specified output directory instead of the currently selected
     target.
NOTRY=true

Review URL: https://codereview.chromium.org/597553003

Cr-Commit-Position: refs/heads/master@{#297442}

tools/cr/cr/commands/info.py

@@ -27,6 +27,7 @@ class InfoCommand(cr.Command):
   def EarlyArgProcessing(self):
     if getattr(cr.context.args, '_short', False):
       self.requires_build_dir = False
+    cr.Command.EarlyArgProcessing(self)
 
   def Run(self):
     if cr.context.remains: