test/ruby/find_executable.rb

* test/ruby/test_rubyoptions.rb (test_program_name): use expected
  ps command from PATH.

* test/ruby/find_executable.rb (EnvUtil#find_executable): find
  expected executable path with argument and output pattern.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46751 b2dd03c8-39d4-4d8f-98ff-823fe69b080e