storage/federated/Makefile.am:
  federated needs functions from mysys/string.c.
  mysqld does not use them, so they don't get into the binary.
storage/federated/plug.in:
  enable federated again.
  remove it from all configurations.
storage/federatedx/Makefile.am:
  federatedx is now called federatedx in configure
storage/federatedx/ha_federatedx.cc:
  federatedx is now called federatedx in configure
storage/federatedx/plug.in:
  federatedx is now called federatedx in configure
storage/innodb_plugin/plug.in:
  enable innodb plugin again.
  remove it from all configurations.
storage/xtradb/CMakeLists.txt:
  xtradb is now called xtradb in configure,
  and builds libxtradb.a and ha_xtradb.so
storage/xtradb/Makefile.am:
  xtradb is now called xtradb in configure,
  and builds libxtradb.a and ha_xtradb.so
storage/xtradb/handler/ha_innodb.cc:
  xtradb is now called xtradb in configure,
  and builds libxtradb.a and ha_xtradb.so
storage/xtradb/plug.in:
  xtradb is now called xtradb in configure,
  and builds libxtradb.a and ha_xtradb.so