fix centos fails libpq-dev package

Author: Mori Reo

recipes/ruby.rb

@@ -46,10 +46,12 @@
   node['postgresql']['client']['packages'].each do |pg_pack|
     resources("package[#{pg_pack}]").run_action(:install)
   end
-  
-  package "libpq-dev" do
-    action :nothing
-  end.run_action(:install)
+
+  if ["debian","ubuntu"].include? node['platform']  
+    package "libpq-dev" do
+        action :nothing
+    end.run_action(:install)
+  end
 
   begin
     chef_gem "pg"