PDF has creation support

git-svn-id: https://svn.osgeo.org/gdal/trunk@26825 f0d54148-0727-0410-94bb-9a71ac55c965
try to silence complaints about unknown #pragmas for GCC <= 4.6 #5299

git-svn-id: https://svn.osgeo.org/gdal/trunk@26826 f0d54148-0727-0410-94bb-9a71ac55c965