Update platform support in readme
Update platform support in readme

jtimberman/ossec-cookbook,yakara-ltd/ossec-cookbook,strataconsulting/ossec-cookbook,jtimberman/ossec-cookbook,jtimberman/ossec-cookbook,strataconsulting/ossec-cookbook,yakara-ltd/ossec-cookbook,strataconsulting/ossec-cookbook,yakara-ltd/ossec-cookbook