stupid mistake made emerge *always* compile the package, this fixes it.

Signed-off-by: Opscode, Inc. <oss@opscode.com>

Author: Ezra Zygmuntowicz

chef/lib/chef/provider/package/portage.rb

@@ -29,7 +29,7 @@ def load_current_resource
           @current_resource = Chef::Resource::Package.new(@new_resource.name)
           @current_resource.package_name(@new_resource.package_name)
 
-          status = popen4("emerge --color n --nospinner --search #{@new_resource.package_name}") do |pid, stdin, stdout, stderr|
+          status = popen4("emerge --color n --nospinner --search #{@new_resource.package_name.split('/').last}") do |pid, stdin, stdout, stderr|
             stdin.close
 
             available, installed = parse_emerge(@new_resource.package_name, stdout.read)