Move verbose ENV setup out of brew.rb

Library/Homebrew/extend/ENV/super.rb

@@ -70,6 +70,7 @@ module Superenv
     self['HOMEBREW_BREW_FILE'] = HOMEBREW_BREW_FILE
     self['HOMEBREW_SDKROOT'] = "#{MacOS.sdk_path}" if MacOS::Xcode.without_clt?
     self['HOMEBREW_DEVELOPER_DIR'] = determine_developer_dir # used by our xcrun shim
+    self['HOMEBREW_VERBOSE'] = "1" if ARGV.verbose?
     self['CMAKE_PREFIX_PATH'] = determine_cmake_prefix_path
     self['CMAKE_FRAMEWORK_PATH'] = determine_cmake_frameworks_path
     self['CMAKE_INCLUDE_PATH'] = determine_cmake_include_path

Library/brew.rb

@@ -58,8 +58,6 @@ end
 begin
   trap("INT", std_trap) # restore default CTRL-C handler
 
-  ENV['HOMEBREW_VERBOSE'] = "1" if ARGV.verbose?
-
   aliases = {'ls' => 'list',
              'homepage' => 'home',
              '-S' => 'search',