Skip binary data with binds test for mysql2, fix build

Mysql2 doesn't support binds, which means no binds payload is set when
logging, so the logic to render binary data differently here doesn't work.

Introduced in 99d142a.

activerecord/lib/active_record/log_subscriber.rb

@@ -1,7 +1,7 @@
 module ActiveRecord
   class LogSubscriber < ActiveSupport::LogSubscriber
     IGNORE_PAYLOAD_NAMES = ["SCHEMA", "EXPLAIN"]
-    
+
     def self.runtime=(value)
       Thread.current[:active_record_sql_runtime] = value
     end

activerecord/test/cases/log_subscriber_test.rb

@@ -103,6 +103,8 @@ def test_initializes_runtime
   end
 
   def test_binary_data_is_not_logged
+    skip if current_adapter?(:Mysql2Adapter)
+
     Binary.create(:data => 'some binary data')
     wait
     assert_equal 3, @logger.logged(:debug).size