rubocop: In-line disables of Style/GlobalVars offenses

- We're working to remove the global `Excludes:` from RuboCop configuration in `Homebrew/brew` (see issue 14685 over there).
- This file in Cask was the only place where global vars weren't already in-line disabled. So, to be able to clean up the configuration stanza in Homebrew/brew PR 14878, I've added some.

developer/bin/generate_cask_token

@@ -370,7 +370,7 @@ def warnings
 end
 
 def report
-  puts "Proposed Simplified App name: #{simplified_app_name}" if $debug
+  puts "Proposed Simplified App name: #{simplified_app_name}" if $debug # rubocop:disable Style/GlobalVars
   puts "Proposed token:               #{cask_token}"
   puts "Proposed file name:           #{cask_file_name}"
   puts "Cask Header Line:             cask \"#{cask_token}\" do"
@@ -402,7 +402,7 @@ if /^-+h(elp)?$/i.match?(ARGV.first)
 end
 
 if /^-+debug?$/i.match?(ARGV.first)
-  $debug = 1
+  $debug = 1 # rubocop:disable Style/GlobalVars
   ARGV.shift
 end
 

developer/bin/list_login_items_for_app

@@ -38,7 +38,7 @@ def process_args
     puts usage
     exit 0
   elsif ARGV.length == 1
-    $app_path = ARGV.first
+    $app_path = ARGV.first # rubocop:disable Style/GlobalVars
   else
     puts usage
     exit 1
@@ -63,4 +63,4 @@ end
 ###
 
 process_args
-list_login_items_for_app $app_path
+list_login_items_for_app $app_path # rubocop:disable Style/GlobalVars

developer/bin/list_running_app_ids

@@ -17,6 +17,7 @@ require "io/console"
 ### globals
 ###
 
+# rubocop:disable Style/GlobalVars
 $opt_test = nil
 $COLUMNS = IO.console.winsize.last
 
@@ -120,3 +121,4 @@ if $opt_test
 else
   report_apps
 end
+# rubocop:enable Style/GlobalVars