Fix permissions/mode of [php][ext_conf_dir]
Fix permissions/mode of [php][ext_conf_dir]

Since the resource pointed by `node['php']['ext_conf_dir']` will certainly be a directory it will need execution permissions. Otherwise when activating an extension for CLI for instance by creating a symlink under `/etc/php5/cli/conf.d` it won't be able to read and import it.
dastergon/php,inviqa/php,getoutreach/php,chef-cookbooks/php,sergiuionescu/php,edmunds-chef/php,Tiger66639/php,Dorozhko-Anton/php,periscopedevelopment/php,opscode-cookbooks/php,opscode-cookbooks/php,beubi/cookbook-php,ck-1/php,ranjithamca/php,Sauraus/php,ranjithamca/php,Sauraus/php,periscopedevelopment/php,chef-cookbooks/php,dastergon/php,Tiger66639/php,getoutreach/php,ck-1/php,beubi/cookbook-php,rshade/php,inviqa/php,rshade/php,edmunds-chef/php,sergiuionescu/php,Dorozhko-Anton/php