[gdal-dev] patch for building gdal on AIX

[chen zhen]

Hi all,

After struggling for a time, I finally build gdal library on AIX
successfully. I opened a ticket to commit the patch for building and
discussing relative issues.( https://trac.osgeo.org/gdal/ticket/4809). Hope
this useful to whom working on AIX and gdal. Any comment on the second
modification is welcome. 

I am also appreciated if anyone could review the patch and commit it to svn.

Regards,

zhen