configure not defining HAVE_MMAP under AIX 3.2.5

[bwa@shadow.dbapic.com.au (Barry W Anderson)]

Has anyone else seen this? I don't mind tracking it down if no-one else
already has...

cheers,

_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/
_/ __________                                       _/                 /      _/
_/ \______   \_____  _______ _______ ___.__.        _/  \             / /     _/
_/  |    |  _/\__  \ \_  __ \\_  __ <   |  |        _/   \\\' ,      / //     _/
_/  |    |   \ / __ \ |  | \/ |  | \/\___  |        _/    \\\//,   _/ //,     _/
_/  |______  /(____  /|__|    |__|   / ____|        _/     \_-//' /  //<,     _/
_/         \/      \/                \/             _/      \ ///  <//`       _/
_/ Barry W Anderson                                 _/      /  >>   \\\`__/_  _/
_/ Journeyman Systems Mage                          _/     /,)-^>>  _\` \\\   _/
_/                                                  _/     (/   \\ / \\\      _/
_/ bwa@c031.aone.net.au                             _/          //  //\\\     _/
_/ bwa@dbapic.com.au                                _/ --------((`-((`------- _/
_/                                                  _/                        _/
_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/_/