add support for doing mlockall before mallc instead of after
  (recommit in 5.0)


ndb/include/portlib/NdbMem.h:
  add support for doing mlockall before mallc instead of after
ndb/src/common/portlib/NdbMem.c:
  add support for doing mlockall before mallc instead of after
ndb/src/kernel/blocks/cmvmi/Cmvmi.cpp:
  add support for doing mlockall before mallc instead of after
ndb/src/kernel/vm/Configuration.cpp:
  add support for doing mlockall before mallc instead of after
ndb/src/kernel/vm/Configuration.hpp:
  add support for doing mlockall before mallc instead of after
ndb/src/mgmsrv/ConfigInfo.cpp:
  add support for doing mlockall before mallc instead of after