Implement linkage for Linux

Library/Homebrew/extend/pathname.rb

@@ -470,6 +470,10 @@ class Pathname
       end
     }
   end
+
+  def mach_o_bundle?
+    false
+  end
 end
 
 require "extend/os/pathname"

Library/Homebrew/os/mac/linkage_checker.rb

@@ -23,7 +23,7 @@ class LinkageChecker
   def check_dylibs
     @keg.find do |file|
       next if file.symlink? || file.directory?
-      next unless file.dylib? || file.mach_o_executable? || file.mach_o_bundle?
+      next unless file.dylib? || file.binary_executable? || file.mach_o_bundle?
 
       # weakly loaded dylibs may not actually exist on disk, so skip them
       # when checking for broken linkage

Library/Homebrew/os/mac/mach.rb

@@ -103,6 +103,8 @@ module MachOShim
     mach_data.any? { |m| m.fetch(:type) == :executable }
   end
 
+  alias binary_executable? mach_o_executable?
+
   # @private
   def mach_o_bundle?
     mach_data.any? { |m| m.fetch(:type) == :bundle }