Update the Rakefile to get rid of deprecated targets

Signed-off-by: Chris Lalancette <clalancette@gmail.com>

Rakefile

@@ -10,9 +10,9 @@
 
 # Rakefile for ruby-rpm -*- ruby -*-
 require 'rake/clean'
-require 'rake/rdoctask'
+require 'rdoc/task'
 require 'rake/testtask'
-require 'rake/gempackagetask'
+require 'rubygems/package_task'
 require 'rbconfig'
 
 PKG_NAME='ruby-libvirt'
@@ -141,7 +141,7 @@ SPEC = Gem::Specification.new do |s|
     s.description = "Ruby bindings for libvirt."
 end
 
-Rake::GemPackageTask.new(SPEC) do |pkg|
+Gem::PackageTask.new(SPEC) do |pkg|
     pkg.need_tar = true
     pkg.need_zip = true
 end

ruby-libvirt.spec

@@ -14,6 +14,7 @@ BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 
 BuildRequires:  ruby ruby-devel rubygem(rake)
 BuildRequires:  libvirt-devel >= 0.4.0
+BuildRequires:  rubygem-rdoc
 Requires:       ruby(abi) = 1.8
 Provides:       ruby(libvirt) = %{version}