Use correct include for 'write()' on POSIX systems
Use correct include for 'write()' on POSIX systems

Fixes compilation errors in ctkErrorLogModel.cpp for gcc 4.7
and clang.

Sardge/CTK,rkhlebnikov/CTK,sankhesh/CTK,ddao/CTK,lassoan/CTK,151706061/CTK,finetjul/CTK,pieper/CTK,naucoin/CTK,151706061/CTK,mehrtash/CTK,danielknorr/CTK,espakm/CTK,CJGoch/CTK,laurennlam/CTK,espakm/CTK,sankhesh/CTK,SINTEFMedtek/CTK,sankhesh/CTK,jcfr/CTK,msmolens/CTK,vovythevov/CTK,151706061/CTK,msmolens/CTK,Sardge/CTK,fedorov/CTK,Heather/CTK,AndreasFetzer/CTK,mehrtash/CTK,laurennlam/CTK,commontk/CTK,lassoan/CTK,ddao/CTK,finetjul/CTK,lassoan/CTK,espakm/CTK,commontk/CTK,fedorov/CTK,laurennlam/CTK,danielknorr/CTK,vovythevov/CTK,CJGoch/CTK,SINTEFMedtek/CTK,sankhesh/CTK,Heather/CTK,Heather/CTK,151706061/CTK,mehrtash/CTK,ddao/CTK,jcfr/CTK,vovythevov/CTK,SINTEFMedtek/CTK,pieper/CTK,SINTEFMedtek/CTK,jcfr/CTK,rkhlebnikov/CTK,SINTEFMedtek/CTK,rkhlebnikov/CTK,jcfr/CTK,fedorov/CTK,ddao/CTK,CJGoch/CTK,CJGoch/CTK,finetjul/CTK,Heather/CTK,vovythevov/CTK,espakm/CTK,msmolens/CTK,mehrtash/CTK,rkhlebnikov/CTK,AndreasFetzer/CTK,fedorov/CTK,CJGoch/CTK,naucoin/CTK,finetjul/CTK,msmolens/CTK,laurennlam/CTK,Sardge/CTK,danielknorr/CTK,AndreasFetzer/CTK,commontk/CTK,danielknorr/CTK,naucoin/CTK,naucoin/CTK,Sardge/CTK,commontk/CTK,AndreasFetzer/CTK,lassoan/CTK,151706061/CTK,jcfr/CTK,pieper/CTK,pieper/CTK