including a small change to build_table_filename().


mysql-test/mysql-test-run.pl:
  Remove unused bad merge bitrot code.  This chunk of code is a repeat
  copy of an earlier chunk, and should never have been here.
mysql-test/r/innodb.result:
  Updates to allow innodb.test to be run with --embedded-server
mysql-test/suite/binlog/r/binlog_innodb.result:
  Updates to allow innodb.test to be run with --embedded-server
mysql-test/suite/binlog/t/binlog_innodb.test:
  Updates to allow innodb.test to be run with --embedded-server
mysql-test/t/innodb.test:
  Updates to allow innodb.test to be run with --embedded-server
sql/sql_table.cc:
  build_table_filename(): Don't add FN_ROOTDIR to mysql_data_home if
  it's already there.  This is done to make it easier to write tests
  which check the output of various error messages, and work with
  both the embedded server (mysql_data_home is full path, including
  trailing FN_ROOTDIR) and normal server (mysql_data_home is just ".").