Update .spec for RPM packages

pkg/rpm/SPECS/sysd.spec

@@ -1,17 +1,13 @@
 Summary: the daemon who supplies firsthand system data
 Name: sysd
-Version: 0.5.0
+Version: 0.6.0
 Release: 6%{?dist}
 License: Apache License, Version 2.0
 Group: Applications/System
-Source0: http://github.com/hacking-thursday/sysd/archive/sysd-0.5.0.tar.gz
-#Source1: 
+Source: https://github.com/hacking-thursday/sysd/releases/download/v0.6.0/sysd-0.6.0.tar.gz
 Url: https://github.com/hacking-thursday/sysd
-#Patch: 
 Buildroot: %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires: golang
-#Requires(preun): 
-#Requires(post): 
 
 %description
 sysd implements a light dependeny daemon in golang, and provides /proc,/sys the firsthand system data in json/xml/... common formats with a high-level RESTful HTTP API. With sysd, application and plugin developers are able to save their works from parsing variant output from low-level unix command tools, and dependencies.