Fixed quiet for download_strategy

Library/Homebrew/download_strategy.rb

@@ -38,6 +38,7 @@ class AbstractDownloadStrategy
     @version = version
     @cache = meta.fetch(:cache, HOMEBREW_CACHE)
     @meta = meta
+    @quiet = false
     extend Pourable if meta[:bottle]
   end
 
@@ -55,6 +56,10 @@ class AbstractDownloadStrategy
     @quiet = true
   end
 
+  def quiet?
+    Context.current.quiet? || @quiet
+  end
+
   # Unpack {#cached_location} into the current working directory, and possibly
   # chdir into the newly-unpacked directory.
   # Unlike {Resource#stage}, this does not take a block.