Fix template/fake.rb.in when external and internal encodings are set

* To be able to run spec/ruby/command_line/dash_encoding_spec.rb
  with the in-repo build.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64567 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

template/fake.rb.in

@@ -41,10 +41,10 @@ builddir = File.dirname(File.expand_path(__FILE__))
 srcdir = "<%=arg['srcdir']%>"
 top_srcdir = File.realpath(srcdir, builddir)
 fake = File.join(top_srcdir, "tool/fake.rb")
-eval(File.read(fake), nil, fake)
+eval(File.binread(fake), nil, fake)
 ropt = "-r#{__FILE__}"
 ["RUBYOPT"].each do |flag|
-  opt = ENV[flag]
+  opt = ENV[flag].b
   opt = opt ? ([ropt] | opt.split).join(" ") : ropt
   ENV[flag] = opt
 end